x(8x+9)-(8x^2+8x+4)=4

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Solution for x(8x+9)-(8x^2+8x+4)=4 equation:


Simplifying
x(8x + 9) + -1(8x2 + 8x + 4) = 4

Reorder the terms:
x(9 + 8x) + -1(8x2 + 8x + 4) = 4
(9 * x + 8x * x) + -1(8x2 + 8x + 4) = 4
(9x + 8x2) + -1(8x2 + 8x + 4) = 4

Reorder the terms:
9x + 8x2 + -1(4 + 8x + 8x2) = 4
9x + 8x2 + (4 * -1 + 8x * -1 + 8x2 * -1) = 4
9x + 8x2 + (-4 + -8x + -8x2) = 4

Reorder the terms:
-4 + 9x + -8x + 8x2 + -8x2 = 4

Combine like terms: 9x + -8x = 1x
-4 + 1x + 8x2 + -8x2 = 4

Combine like terms: 8x2 + -8x2 = 0
-4 + 1x + 0 = 4
-4 + 1x = 4

Solving
-4 + 1x = 4

Solving for variable 'x'.

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

Add '4' to each side of the equation.
-4 + 4 + 1x = 4 + 4

Combine like terms: -4 + 4 = 0
0 + 1x = 4 + 4
1x = 4 + 4

Combine like terms: 4 + 4 = 8
1x = 8

Divide each side by '1'.
x = 8

Simplifying
x = 8

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