Solve Polynomialrootcalculator 2x3-3x2-5x+6 Tiger Algebra Solver

Reformatting the input :

Changes made to your input should not affect the solution: (1): "x2" was replaced by "x^2". 1 more similar replacement(s).

Step 1 :

Equation at the end of step 1 :

(((2 • (x3)) - 3x2) - 5x) + 6

Step 2 :

Equation at the end of step 2 :

((2x3 - 3x2) - 5x) + 6

Step 3 :

Checking for a perfect cube :

3.1 2x3-3x2-5x+6 is not a perfect cube

Trying to factor by pulling out :

3.2 Factoring: 2x3-3x2-5x+6 Thoughtfully split the expression at hand into groups, each group having two terms :Group 1: -5x+6 Group 2: 2x3-3x2 Pull out from each group separately :Group 1: (-5x+6) • (1) = (5x-6) • (-1)Group 2: (2x-3) • (x2)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 :

3.3 Find roots (zeroes) of : F(x) = 2x3-3x2-5x+6Polynomial 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 2 and the Trailing Constant is 6. The factor(s) are: of the Leading Coefficient : 1,2 of the Trailing Constant : 1 ,2 ,3 ,6 Let us test ....

PQP/QF(P/Q)Divisor
-1 1 -1.00 6.00
-1 2 -0.50 7.50
-2 1 -2.00 -12.00
-3 1 -3.00 -60.00
-3 2 -1.50 0.00 2x+3
-6 1 -6.00 -504.00
1 1 1.00 0.00 x-1
1 2 0.50 3.00
2 1 2.00 0.00 x-2
3 1 3.00 18.00
3 2 1.50 -1.50
6 1 6.00 300.00

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 2x3-3x2-5x+6 can be divided by 3 different polynomials,including by x-2

Polynomial Long Division :

3.4 Polynomial Long Division Dividing : 2x3-3x2-5x+6 ("Dividend") By : x-2 ("Divisor")

dividend 2x3 - 3x2 - 5x + 6
- divisor * 2x2 2x3 - 4x2
remainder x2 - 5x + 6
- divisor * x1 x2 - 2x
remainder- 3x + 6
- divisor * -3x0 - 3x + 6
remainder0

Quotient : 2x2+x-3 Remainder: 0

Trying to factor by splitting the middle term

3.5 Factoring 2x2+x-3 The first term is, 2x2 its coefficient is 2 .The middle term is, +x its coefficient is 1 .The last term, "the constant", is -3 Step-1 : Multiply the coefficient of the first term by the constant 2-3 = -6 Step-2 : Find two factors of -6 whose sum equals the coefficient of the middle term, which is 1 .

-6 + 1 = -5
-3 + 2 = -1
-2 + 3 = 1 That's it

Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above, -2 and 3 2x2 - 2x + 3x - 3Step-4 : Add up the first 2 terms, pulling out like factors : 2x • (x-1) Add up the last 2 terms, pulling out common factors : 3 • (x-1) Step-5 : Add up the four terms of step 4 : (2x+3) • (x-1) Which is the desired factorization

Final result :

(x - 1) • (2x + 3) • (x - 2)

Từ khóa » F(x)=2x^3-3x^2-5x+6 K=1