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Simplifying
9x2 + -1x + -1 = -1x
Reorder the terms:
-1 + -1x + 9x2 = -1x
Add 'x' to each side of the equation.
-1 + -1x + x + 9x2 = -1x + x
Combine like terms: -1x + x = 0
-1 + 0 + 9x2 = -1x + x
-1 + 9x2 = -1x + x
Combine like terms: -1x + x = 0
-1 + 9x2 = 0
Solving
-1 + 9x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '1' to each side of the equation.
-1 + 1 + 9x2 = 0 + 1
Combine like terms: -1 + 1 = 0
0 + 9x2 = 0 + 1
9x2 = 0 + 1
Combine like terms: 0 + 1 = 1
9x2 = 1
Divide each side by '9'.
x2 = 0.1111111111
Simplifying
x2 = 0.1111111111
Take the square root of each side:
x = {-0.333333333, 0.333333333}
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