7x(x)+8=15

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Solution for 7x(x)+8=15 equation: 


Simplifying
7x(x) + 8 = 15

Multiply x * x
7x2 + 8 = 15

Reorder the terms:
8 + 7x2 = 15

Solving
8 + 7x2 = 15

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-8' to each side of the equation.
8 + -8 + 7x2 = 15 + -8

Combine like terms: 8 + -8 = 0
0 + 7x2 = 15 + -8
7x2 = 15 + -8

Combine like terms: 15 + -8 = 7
7x2 = 7

Divide each side by '7'.
x2 = 1

Simplifying
x2 = 1

Take the square root of each side:
x = {-1, 1}

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