(x-2)(2x+1)=3

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Solution for (x-2)(2x+1)=3 equation:


Simplifying
(x + -2)(2x + 1) = 3

Reorder the terms:
(-2 + x)(2x + 1) = 3

Reorder the terms:
(-2 + x)(1 + 2x) = 3

Multiply (-2 + x) * (1 + 2x)
(-2(1 + 2x) + x(1 + 2x)) = 3
((1 * -2 + 2x * -2) + x(1 + 2x)) = 3
((-2 + -4x) + x(1 + 2x)) = 3
(-2 + -4x + (1 * x + 2x * x)) = 3
(-2 + -4x + (1x + 2x2)) = 3

Combine like terms: -4x + 1x = -3x
(-2 + -3x + 2x2) = 3

Solving
-2 + -3x + 2x2 = 3

Solving for variable 'x'.

Reorder the terms:
-2 + -3 + -3x + 2x2 = 3 + -3

Combine like terms: -2 + -3 = -5
-5 + -3x + 2x2 = 3 + -3

Combine like terms: 3 + -3 = 0
-5 + -3x + 2x2 = 0

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

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 '(5 + -2x)' equal to zero and attempt to solve: Simplifying 5 + -2x = 0 Solving 5 + -2x = 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 + -2x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -2x = 0 + -5 -2x = 0 + -5 Combine like terms: 0 + -5 = -5 -2x = -5 Divide each side by '-2'. x = 2.5 Simplifying x = 2.5

Solution

x = {-1, 2.5}

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