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Simplifying
21780 = 5x2
Solving
21780 = 5x2
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-5x2' to each side of the equation.
21780 + -5x2 = 5x2 + -5x2
Combine like terms: 5x2 + -5x2 = 0
21780 + -5x2 = 0
Add '-21780' to each side of the equation.
21780 + -21780 + -5x2 = 0 + -21780
Combine like terms: 21780 + -21780 = 0
0 + -5x2 = 0 + -21780
-5x2 = 0 + -21780
Combine like terms: 0 + -21780 = -21780
-5x2 = -21780
Divide each side by '-5'.
x2 = 4356
Simplifying
x2 = 4356
Take the square root of each side:
x = {-66, 66}
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