4(x+1)(x-2)=

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Solution for 4(x+1)(x-2)= equation:


Simplifying
4(x + 1)(x + -2) = 0

Reorder the terms:
4(1 + x)(x + -2) = 0

Reorder the terms:
4(1 + x)(-2 + x) = 0

Multiply (1 + x) * (-2 + x)
4(1(-2 + x) + x(-2 + x)) = 0
4((-2 * 1 + x * 1) + x(-2 + x)) = 0
4((-2 + 1x) + x(-2 + x)) = 0
4(-2 + 1x + (-2 * x + x * x)) = 0
4(-2 + 1x + (-2x + x2)) = 0

Combine like terms: 1x + -2x = -1x
4(-2 + -1x + x2) = 0
(-2 * 4 + -1x * 4 + x2 * 4) = 0
(-8 + -4x + 4x2) = 0

Solving
-8 + -4x + 4x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '4'.
4(-2 + -1x + x2) = 0

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

Ignore the factor 4.

Subproblem 1

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

Subproblem 2

Set the factor '(2 + -1x)' equal to zero and attempt to solve: Simplifying 2 + -1x = 0 Solving 2 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -1x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1x = 0 + -2 -1x = 0 + -2 Combine like terms: 0 + -2 = -2 -1x = -2 Divide each side by '-1'. x = 2 Simplifying x = 2

Solution

x = {-1, 2}

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