x(x+7)-2=28

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Solution for x(x+7)-2=28 equation:


Simplifying
x(x + 7) + -2 = 28

Reorder the terms:
x(7 + x) + -2 = 28
(7 * x + x * x) + -2 = 28
(7x + x2) + -2 = 28

Reorder the terms:
-2 + 7x + x2 = 28

Solving
-2 + 7x + x2 = 28

Solving for variable 'x'.

Reorder the terms:
-2 + -28 + 7x + x2 = 28 + -28

Combine like terms: -2 + -28 = -30
-30 + 7x + x2 = 28 + -28

Combine like terms: 28 + -28 = 0
-30 + 7x + x2 = 0

Factor a trinomial.
(-10 + -1x)(3 + -1x) = 0

Subproblem 1

Set the factor '(-10 + -1x)' equal to zero and attempt to solve: Simplifying -10 + -1x = 0 Solving -10 + -1x = 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 + -1x = 0 + 10 Combine like terms: -10 + 10 = 0 0 + -1x = 0 + 10 -1x = 0 + 10 Combine like terms: 0 + 10 = 10 -1x = 10 Divide each side by '-1'. x = -10 Simplifying x = -10

Subproblem 2

Set the factor '(3 + -1x)' equal to zero and attempt to solve: Simplifying 3 + -1x = 0 Solving 3 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -1x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1x = 0 + -3 -1x = 0 + -3 Combine like terms: 0 + -3 = -3 -1x = -3 Divide each side by '-1'. x = 3 Simplifying x = 3

Solution

x = {-10, 3}

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