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Simplifying
4x2 + -5 = 9
Reorder the terms:
-5 + 4x2 = 9
Solving
-5 + 4x2 = 9
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '5' to each side of the equation.
-5 + 5 + 4x2 = 9 + 5
Combine like terms: -5 + 5 = 0
0 + 4x2 = 9 + 5
4x2 = 9 + 5
Combine like terms: 9 + 5 = 14
4x2 = 14
Divide each side by '4'.
x2 = 3.5
Simplifying
x2 = 3.5
Take the square root of each side:
x = {-1.870828693, 1.870828693}
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