(x-.8)(x+.8)=23

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Solution for (x-.8)(x+.8)=23 equation: 


Simplifying
(x + -0.8)(x + 0.8) = 23

Reorder the terms:
(-0.8 + x)(x + 0.8) = 23

Reorder the terms:
(-0.8 + x)(0.8 + x) = 23

Multiply (-0.8 + x) * (0.8 + x)
(-0.8(0.8 + x) + x(0.8 + x)) = 23
((0.8 * -0.8 + x * -0.8) + x(0.8 + x)) = 23
((-0.64 + -0.8x) + x(0.8 + x)) = 23
(-0.64 + -0.8x + (0.8 * x + x * x)) = 23
(-0.64 + -0.8x + (0.8x + x2)) = 23

Combine like terms: -0.8x + 0.8x = 0.0
(-0.64 + 0.0 + x2) = 23
(-0.64 + x2) = 23

Solving
-0.64 + x2 = 23

Solving for variable 'x'.

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

Add '0.64' to each side of the equation.
-0.64 + 0.64 + x2 = 23 + 0.64

Combine like terms: -0.64 + 0.64 = 0.00
0.00 + x2 = 23 + 0.64
x2 = 23 + 0.64

Combine like terms: 23 + 0.64 = 23.64
x2 = 23.64

Simplifying
x2 = 23.64

Take the square root of each side:
x = {-4.862098312, 4.862098312}

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