(x+4)*(x+4)+1=x*x-7

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Solution for (x+4)*(x+4)+1=x*x-7 equation:


Simplifying
(x + 4)(x + 4) + 1 = x * x + -7

Reorder the terms:
(4 + x)(x + 4) + 1 = x * x + -7

Reorder the terms:
(4 + x)(4 + x) + 1 = x * x + -7

Multiply (4 + x) * (4 + x)
(4(4 + x) + x(4 + x)) + 1 = x * x + -7
((4 * 4 + x * 4) + x(4 + x)) + 1 = x * x + -7
((16 + 4x) + x(4 + x)) + 1 = x * x + -7
(16 + 4x + (4 * x + x * x)) + 1 = x * x + -7
(16 + 4x + (4x + x2)) + 1 = x * x + -7

Combine like terms: 4x + 4x = 8x
(16 + 8x + x2) + 1 = x * x + -7

Reorder the terms:
16 + 1 + 8x + x2 = x * x + -7

Combine like terms: 16 + 1 = 17
17 + 8x + x2 = x * x + -7

Multiply x * x
17 + 8x + x2 = x2 + -7

Reorder the terms:
17 + 8x + x2 = -7 + x2

Add '-1x2' to each side of the equation.
17 + 8x + x2 + -1x2 = -7 + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
17 + 8x + 0 = -7 + x2 + -1x2
17 + 8x = -7 + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
17 + 8x = -7 + 0
17 + 8x = -7

Solving
17 + 8x = -7

Solving for variable 'x'.

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

Add '-17' to each side of the equation.
17 + -17 + 8x = -7 + -17

Combine like terms: 17 + -17 = 0
0 + 8x = -7 + -17
8x = -7 + -17

Combine like terms: -7 + -17 = -24
8x = -24

Divide each side by '8'.
x = -3

Simplifying
x = -3

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