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Simplifying
-4 = x2 + -9
Reorder the terms:
-4 = -9 + x2
Solving
-4 = -9 + x2
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-1x2' to each side of the equation.
-4 + -1x2 = -9 + x2 + -1x2
Combine like terms: x2 + -1x2 = 0
-4 + -1x2 = -9 + 0
-4 + -1x2 = -9
Add '4' to each side of the equation.
-4 + 4 + -1x2 = -9 + 4
Combine like terms: -4 + 4 = 0
0 + -1x2 = -9 + 4
-1x2 = -9 + 4
Combine like terms: -9 + 4 = -5
-1x2 = -5
Divide each side by '-1'.
x2 = 5
Simplifying
x2 = 5
Take the square root of each side:
x = {-2.236067978, 2.236067978}
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