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Simplifying
0 = 9x2 + -4
Reorder the terms:
0 = -4 + 9x2
Solving
0 = -4 + 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.
0 + -9x2 = -4 + 9x2 + -9x2
Remove the zero:
-9x2 = -4 + 9x2 + -9x2
Combine like terms: 9x2 + -9x2 = 0
-9x2 = -4 + 0
-9x2 = -4
Divide each side by '-9'.
x2 = 0.4444444444
Simplifying
x2 = 0.4444444444
Take the square root of each side:
x = {-0.666666667, 0.666666667}
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