(X-7)(X+7)=4

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Solution for (X-7)(X+7)=4 equation: 


Simplifying
(X + -7)(X + 7) = 4

Reorder the terms:
(-7 + X)(X + 7) = 4

Reorder the terms:
(-7 + X)(7 + X) = 4

Multiply (-7 + X) * (7 + X)
(-7(7 + X) + X(7 + X)) = 4
((7 * -7 + X * -7) + X(7 + X)) = 4
((-49 + -7X) + X(7 + X)) = 4
(-49 + -7X + (7 * X + X * X)) = 4
(-49 + -7X + (7X + X2)) = 4

Combine like terms: -7X + 7X = 0
(-49 + 0 + X2) = 4
(-49 + X2) = 4

Solving
-49 + X2 = 4

Solving for variable 'X'.

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

Add '49' to each side of the equation.
-49 + 49 + X2 = 4 + 49

Combine like terms: -49 + 49 = 0
0 + X2 = 4 + 49
X2 = 4 + 49

Combine like terms: 4 + 49 = 53
X2 = 53

Simplifying
X2 = 53

Take the square root of each side:
X = {-7.280109889, 7.280109889}

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