4x^2+9-45=0

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Solution for 4x^2+9-45=0 equation:


Simplifying
4x2 + 9 + -45 = 0

Reorder the terms:
9 + -45 + 4x2 = 0

Combine like terms: 9 + -45 = -36
-36 + 4x2 = 0

Solving
-36 + 4x2 = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '36' to each side of the equation.
-36 + 36 + 4x2 = 0 + 36

Combine like terms: -36 + 36 = 0
0 + 4x2 = 0 + 36
4x2 = 0 + 36

Combine like terms: 0 + 36 = 36
4x2 = 36

Divide each side by '4'.
x2 = 9

Simplifying
x2 = 9

Take the square root of each side:
x = {-3, 3}

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