5x+2x(x+4)=7

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Solution for 5x+2x(x+4)=7 equation:


Simplifying
5x + 2x(x + 4) = 7

Reorder the terms:
5x + 2x(4 + x) = 7
5x + (4 * 2x + x * 2x) = 7
5x + (8x + 2x2) = 7

Combine like terms: 5x + 8x = 13x
13x + 2x2 = 7

Solving
13x + 2x2 = 7

Solving for variable 'x'.

Reorder the terms:
-7 + 13x + 2x2 = 7 + -7

Combine like terms: 7 + -7 = 0
-7 + 13x + 2x2 = 0

Factor a trinomial.
(-7 + -1x)(1 + -2x) = 0

Subproblem 1

Set the factor '(-7 + -1x)' equal to zero and attempt to solve: Simplifying -7 + -1x = 0 Solving -7 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -1x = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -1x = 0 + 7 -1x = 0 + 7 Combine like terms: 0 + 7 = 7 -1x = 7 Divide each side by '-1'. x = -7 Simplifying x = -7

Subproblem 2

Set the factor '(1 + -2x)' equal to zero and attempt to solve: Simplifying 1 + -2x = 0 Solving 1 + -2x = 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 + -2x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -2x = 0 + -1 -2x = 0 + -1 Combine like terms: 0 + -1 = -1 -2x = -1 Divide each side by '-2'. x = 0.5 Simplifying x = 0.5

Solution

x = {-7, 0.5}

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