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Simplifying
x(x) + 5(5) = 13(13)
Multiply x * x
x2 + 5(5) = 13(13)
Multiply 5 * 5
x2 + 25 = 13(13)
Reorder the terms:
25 + x2 = 13(13)
Multiply 13 * 13
25 + x2 = 169
Solving
25 + x2 = 169
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 + x2 = 169 + -25
Combine like terms: 25 + -25 = 0
0 + x2 = 169 + -25
x2 = 169 + -25
Combine like terms: 169 + -25 = 144
x2 = 144
Simplifying
x2 = 144
Take the square root of each side:
x = {-12, 12}
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