40=2X+2X^2

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Solution for 40=2X+2X^2 equation:


Simplifying
40 = 2X + 2X2

Solving
40 = 2X + 2X2

Solving for variable 'X'.

Reorder the terms:
40 + -2X + -2X2 = 2X + -2X + 2X2 + -2X2

Combine like terms: 2X + -2X = 0
40 + -2X + -2X2 = 0 + 2X2 + -2X2
40 + -2X + -2X2 = 2X2 + -2X2

Combine like terms: 2X2 + -2X2 = 0
40 + -2X + -2X2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(20 + -1X + -1X2) = 0

Factor a trinomial.
2((4 + -1X)(5 + X)) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(4 + -1X)' equal to zero and attempt to solve: Simplifying 4 + -1X = 0 Solving 4 + -1X = 0 Move all terms containing X to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1X = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1X = 0 + -4 -1X = 0 + -4 Combine like terms: 0 + -4 = -4 -1X = -4 Divide each side by '-1'. X = 4 Simplifying X = 4

Subproblem 2

Set the factor '(5 + X)' equal to zero and attempt to solve: Simplifying 5 + X = 0 Solving 5 + X = 0 Move all terms containing X to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + X = 0 + -5 Combine like terms: 5 + -5 = 0 0 + X = 0 + -5 X = 0 + -5 Combine like terms: 0 + -5 = -5 X = -5 Simplifying X = -5

Solution

X = {4, -5}

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