Solve Polynomialrootcalculator X^3-3x^2-3x-1/x-1 Tiger Algebra Solver

Step 1 :

1 Simplify — x

Equation at the end of step 1 :

1 ((((x3)-(3•(x2)))-3x)-—)-1 x

Step 2 :

Equation at the end of step 2 :

1 ((((x3) - 3x2) - 3x) - —) - 1 x

Step 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 x

Equivalent 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 x

Equation at the end of step 4 :

(x4 - 3x3 - 3x2 - 1) ———————————————————— - 1 x

Step 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 x

Checking 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 ....

PQP/QF(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
remainder0

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 ....

PQP/QF(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 x

Polynomial 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 ....

PQP/QF(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 —————————————————————— x

Từ khóa » F(x)=x^3+3x^2+3x+1 G(x)=x+1