(2x+7)(7-2x)=49+x*(x+2)

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Solution for (2x+7)(7-2x)=49+x*(x+2) equation:


Simplifying
(2x + 7)(7 + -2x) = 49 + x(x + 2)

Reorder the terms:
(7 + 2x)(7 + -2x) = 49 + x(x + 2)

Multiply (7 + 2x) * (7 + -2x)
(7(7 + -2x) + 2x * (7 + -2x)) = 49 + x(x + 2)
((7 * 7 + -2x * 7) + 2x * (7 + -2x)) = 49 + x(x + 2)
((49 + -14x) + 2x * (7 + -2x)) = 49 + x(x + 2)
(49 + -14x + (7 * 2x + -2x * 2x)) = 49 + x(x + 2)
(49 + -14x + (14x + -4x2)) = 49 + x(x + 2)

Combine like terms: -14x + 14x = 0
(49 + 0 + -4x2) = 49 + x(x + 2)
(49 + -4x2) = 49 + x(x + 2)

Reorder the terms:
49 + -4x2 = 49 + x(2 + x)
49 + -4x2 = 49 + (2 * x + x * x)
49 + -4x2 = 49 + (2x + x2)

Add '-49' to each side of the equation.
49 + -49 + -4x2 = 49 + 2x + -49 + x2

Combine like terms: 49 + -49 = 0
0 + -4x2 = 49 + 2x + -49 + x2
-4x2 = 49 + 2x + -49 + x2

Reorder the terms:
-4x2 = 49 + -49 + 2x + x2

Combine like terms: 49 + -49 = 0
-4x2 = 0 + 2x + x2
-4x2 = 2x + x2

Solving
-4x2 = 2x + x2

Solving for variable 'x'.

Reorder the terms:
-2x + -4x2 + -1x2 = 2x + x2 + -2x + -1x2

Combine like terms: -4x2 + -1x2 = -5x2
-2x + -5x2 = 2x + x2 + -2x + -1x2

Reorder the terms:
-2x + -5x2 = 2x + -2x + x2 + -1x2

Combine like terms: 2x + -2x = 0
-2x + -5x2 = 0 + x2 + -1x2
-2x + -5x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-2x + -5x2 = 0

Factor out the Greatest Common Factor (GCF), '-1x'.
-1x(2 + 5x) = 0

Ignore the factor -1.

Subproblem 1

Set the factor 'x' equal to zero and attempt to solve: Simplifying x = 0 Solving x = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x = 0

Subproblem 2

Set the factor '(2 + 5x)' equal to zero and attempt to solve: Simplifying 2 + 5x = 0 Solving 2 + 5x = 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 + 5x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + 5x = 0 + -2 5x = 0 + -2 Combine like terms: 0 + -2 = -2 5x = -2 Divide each side by '5'. x = -0.4 Simplifying x = -0.4

Solution

x = {0, -0.4}

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