(5+x)(5-x)=4

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Solution for (5+x)(5-x)=4 equation: 


Simplifying
(5 + x)(5 + -1x) = 4

Multiply (5 + x) * (5 + -1x)
(5(5 + -1x) + x(5 + -1x)) = 4
((5 * 5 + -1x * 5) + x(5 + -1x)) = 4
((25 + -5x) + x(5 + -1x)) = 4
(25 + -5x + (5 * x + -1x * x)) = 4
(25 + -5x + (5x + -1x2)) = 4

Combine like terms: -5x + 5x = 0
(25 + 0 + -1x2) = 4
(25 + -1x2) = 4

Solving
25 + -1x2 = 4

Solving for variable 'x'.

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

Add '-25' to each side of the equation.
25 + -25 + -1x2 = 4 + -25

Combine like terms: 25 + -25 = 0
0 + -1x2 = 4 + -25
-1x2 = 4 + -25

Combine like terms: 4 + -25 = -21
-1x2 = -21

Divide each side by '-1'.
x2 = 21

Simplifying
x2 = 21

Take the square root of each side:
x = {-4.582575695, 4.582575695}

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