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Simplifying
x2 + -3 = 18 + -9x2
Reorder the terms:
-3 + x2 = 18 + -9x2
Solving
-3 + x2 = 18 + -9x2
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '9x2' to each side of the equation.
-3 + x2 + 9x2 = 18 + -9x2 + 9x2
Combine like terms: x2 + 9x2 = 10x2
-3 + 10x2 = 18 + -9x2 + 9x2
Combine like terms: -9x2 + 9x2 = 0
-3 + 10x2 = 18 + 0
-3 + 10x2 = 18
Add '3' to each side of the equation.
-3 + 3 + 10x2 = 18 + 3
Combine like terms: -3 + 3 = 0
0 + 10x2 = 18 + 3
10x2 = 18 + 3
Combine like terms: 18 + 3 = 21
10x2 = 21
Divide each side by '10'.
x2 = 2.1
Simplifying
x2 = 2.1
Take the square root of each side:
x = {-1.449137675, 1.449137675}
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