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Simplifying
9x2 + -18 + 7 = 0
Reorder the terms:
-18 + 7 + 9x2 = 0
Combine like terms: -18 + 7 = -11
-11 + 9x2 = 0
Solving
-11 + 9x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '11' to each side of the equation.
-11 + 11 + 9x2 = 0 + 11
Combine like terms: -11 + 11 = 0
0 + 9x2 = 0 + 11
9x2 = 0 + 11
Combine like terms: 0 + 11 = 11
9x2 = 11
Divide each side by '9'.
x2 = 1.222222222
Simplifying
x2 = 1.222222222
Take the square root of each side:
x = {-1.105541597, 1.105541597}
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