(s-2)(s-2)-s^2=20

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Solution for (s-2)(s-2)-s^2=20 equation: 


Simplifying
(s + -2)(s + -2) + -1s2 = 20

Reorder the terms:
(-2 + s)(s + -2) + -1s2 = 20

Reorder the terms:
(-2 + s)(-2 + s) + -1s2 = 20

Multiply (-2 + s) * (-2 + s)
(-2(-2 + s) + s(-2 + s)) + -1s2 = 20
((-2 * -2 + s * -2) + s(-2 + s)) + -1s2 = 20
((4 + -2s) + s(-2 + s)) + -1s2 = 20
(4 + -2s + (-2 * s + s * s)) + -1s2 = 20
(4 + -2s + (-2s + s2)) + -1s2 = 20

Combine like terms: -2s + -2s = -4s
(4 + -4s + s2) + -1s2 = 20

Combine like terms: s2 + -1s2 = 0
4 + -4s + 0 = 20
4 + -4s = 20

Solving
4 + -4s = 20

Solving for variable 's'.

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

Add '-4' to each side of the equation.
4 + -4 + -4s = 20 + -4

Combine like terms: 4 + -4 = 0
0 + -4s = 20 + -4
-4s = 20 + -4

Combine like terms: 20 + -4 = 16
-4s = 16

Divide each side by '-4'.
s = -4

Simplifying
s = -4

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