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Simplifying
9x2 + -4 = 7
Reorder the terms:
-4 + 9x2 = 7
Solving
-4 + 9x2 = 7
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '4' to each side of the equation.
-4 + 4 + 9x2 = 7 + 4
Combine like terms: -4 + 4 = 0
0 + 9x2 = 7 + 4
9x2 = 7 + 4
Combine like terms: 7 + 4 = 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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