72=X^2+2X-8

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Solution for 72=X^2+2X-8 equation:


Simplifying
72 = X2 + 2X + -8

Reorder the terms:
72 = -8 + 2X + X2

Solving
72 = -8 + 2X + X2

Solving for variable 'X'.

Combine like terms: 72 + 8 = 80
80 + -2X + -1X2 = -8 + 2X + X2 + 8 + -2X + -1X2

Reorder the terms:
80 + -2X + -1X2 = -8 + 8 + 2X + -2X + X2 + -1X2

Combine like terms: -8 + 8 = 0
80 + -2X + -1X2 = 0 + 2X + -2X + X2 + -1X2
80 + -2X + -1X2 = 2X + -2X + X2 + -1X2

Combine like terms: 2X + -2X = 0
80 + -2X + -1X2 = 0 + X2 + -1X2
80 + -2X + -1X2 = X2 + -1X2

Combine like terms: X2 + -1X2 = 0
80 + -2X + -1X2 = 0

Factor a trinomial.
(8 + -1X)(10 + X) = 0

Subproblem 1

Set the factor '(8 + -1X)' equal to zero and attempt to solve: Simplifying 8 + -1X = 0 Solving 8 + -1X = 0 Move all terms containing X to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -1X = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1X = 0 + -8 -1X = 0 + -8 Combine like terms: 0 + -8 = -8 -1X = -8 Divide each side by '-1'. X = 8 Simplifying X = 8

Subproblem 2

Set the factor '(10 + X)' equal to zero and attempt to solve: Simplifying 10 + X = 0 Solving 10 + X = 0 Move all terms containing X to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + X = 0 + -10 Combine like terms: 10 + -10 = 0 0 + X = 0 + -10 X = 0 + -10 Combine like terms: 0 + -10 = -10 X = -10 Simplifying X = -10

Solution

X = {8, -10}

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