Solve Polynomialrootcalculator X^3-3x^2-3x-1/x-1 Tiger Algebra Solver
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Step 1 :
1 Simplify — xEquation at the end of step 1 :
1 ((((x3)-(3•(x2)))-3x)-—)-1 xStep 2 :
Equation at the end of step 2 :
1 ((((x3) - 3x2) - 3x) - —) - 1 xStep 3 :
Rewriting the whole as an Equivalent Fraction :
3.1 Subtracting a fraction from a whole Rewrite the whole as a fraction using x as the denominator :
x3 - 3x2 - 3x (x3 - 3x2 - 3x) • x x3 - 3x2 - 3x = ————————————— = ——————————————————— 1 xEquivalent fraction : The fraction thus generated looks different but has the same value as the whole Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator
Step 4 :
Pulling out like terms :
4.1 Pull out like factors : x3 - 3x2 - 3x = x • (x2 - 3x - 3)
Trying to factor by splitting the middle term
4.2 Factoring x2 - 3x - 3 The first term is, x2 its coefficient is 1 .The middle term is, -3x its coefficient is -3 .The last term, "the constant", is -3 Step-1 : Multiply the coefficient of the first term by the constant 1 • -3 = -3 Step-2 : Find two factors of -3 whose sum equals the coefficient of the middle term, which is -3 .
-3 | + | 1 | = | -2 |
-1 | + | 3 | = | 2 |
Observation : No two such factors can be found !! Conclusion : Trinomial can not be factored
Adding fractions that have a common denominator :
4.3 Adding up the two equivalent fractions Add the two equivalent fractions which now have a common denominatorCombine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:
x • (x2-3x-3) • x - (1) x4 - 3x3 - 3x2 - 1 ——————————————————————— = —————————————————— x xEquation at the end of step 4 :
(x4 - 3x3 - 3x2 - 1) ———————————————————— - 1 xStep 5 :
Rewriting the whole as an Equivalent Fraction :
5.1 Subtracting a whole from a fraction Rewrite the whole as a fraction using x as the denominator :
1 1 • x 1 = — = ————— 1 xChecking for a perfect cube :
5.2 x4 - 3x3 - 3x2 - 1 is not a perfect cube
Trying to factor by pulling out :
5.3 Factoring: x4 - 3x3 - 3x2 - 1 Thoughtfully split the expression at hand into groups, each group having two terms :Group 1: -3x2 - 1 Group 2: -3x3 + x4 Pull out from each group separately :Group 1: (3x2 + 1) • (-1)Group 2: (x - 3) • (x3)Bad news !! Factoring by pulling out fails : The groups have no common factor and can not be added up to form a multiplication.
Polynomial Roots Calculator :
5.4 Find roots (zeroes) of : F(x) = x4 - 3x3 - 3x2 - 1Polynomial Roots Calculator is a set of methods aimed at finding values of x for which F(x)=0 Rational Roots Test is one of the above mentioned tools. It would only find Rational Roots that is numbers x which can be expressed as the quotient of two integersThe Rational Root Theorem states that if a polynomial zeroes for a rational number P/Q then P is a factor of the Trailing Constant and Q is a factor of the Leading CoefficientIn this case, the Leading Coefficient is 1 and the Trailing Constant is -1. The factor(s) are: of the Leading Coefficient : 1 of the Trailing Constant : 1 Let us test ....
P | Q | P/Q | F(P/Q) | Divisor |
---|---|---|---|---|
-1 | 1 | -1.00 | 0.00 | x + 1 |
1 | 1 | 1.00 | -6.00 |
The Factor Theorem states that if P/Q is root of a polynomial then this polynomial can be divided by q*x-p Note that q and p originate from P/Q reduced to its lowest terms In our case this means that x4 - 3x3 - 3x2 - 1 can be divided with x + 1
Polynomial Long Division :
5.5 Polynomial Long Division Dividing : x4 - 3x3 - 3x2 - 1 ("Dividend") By : x + 1 ("Divisor")
dividend | x4 | - | 3x3 | - | 3x2 | - | 1 |
- divisor | * x3 | x4 | + | x3 | |||
remainder | - | 4x3 | - | 3x2 | - | 1 | |
- divisor | * -4x2 | - | 4x3 | - | 4x2 | ||
remainder | x2 | - | 1 | ||||
- divisor | * x1 | x2 | + | x | |||
remainder | - | x | - | 1 | |||
- divisor | * -x0 | - | x | - | 1 | ||
remainder | 0 |
Quotient : x3-4x2+x-1 Remainder: 0
Polynomial Roots Calculator :
5.6 Find roots (zeroes) of : F(x) = x3-4x2+x-1 See theory in step 5.4 In this case, the Leading Coefficient is 1 and the Trailing Constant is -1. The factor(s) are: of the Leading Coefficient : 1 of the Trailing Constant : 1 Let us test ....
P | Q | P/Q | F(P/Q) | Divisor |
---|---|---|---|---|
-1 | 1 | -1.00 | -7.00 | |
1 | 1 | 1.00 | -3.00 |
Polynomial Roots Calculator found no rational roots
Adding fractions that have a common denominator :
5.7 Adding up the two equivalent fractions
(x3-4x2+x-1) • (x+1) - (x) x4 - 3x3 - 3x2 - x - 1 —————————————————————————— = —————————————————————— x xPolynomial Roots Calculator :
5.8 Find roots (zeroes) of : F(x) = x4 - 3x3 - 3x2 - x - 1 See theory in step 5.4 In this case, the Leading Coefficient is 1 and the Trailing Constant is -1. The factor(s) are: of the Leading Coefficient : 1 of the Trailing Constant : 1 Let us test ....
P | Q | P/Q | F(P/Q) | Divisor |
---|---|---|---|---|
-1 | 1 | -1.00 | 1.00 | |
1 | 1 | 1.00 | -7.00 |
Polynomial Roots Calculator found no rational roots
Final result :
x4 - 3x3 - 3x2 - x - 1 —————————————————————— xTừ khóa » F(x)=x^3+3x^2+3x+1 G(x)=x+1
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