2x^2-30=42

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Solution for 2x^2-30=42 equation: 


Simplifying
2x2 + -30 = 42

Reorder the terms:
-30 + 2x2 = 42

Solving
-30 + 2x2 = 42

Solving for variable 'x'.

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

Add '30' to each side of the equation.
-30 + 30 + 2x2 = 42 + 30

Combine like terms: -30 + 30 = 0
0 + 2x2 = 42 + 30
2x2 = 42 + 30

Combine like terms: 42 + 30 = 72
2x2 = 72

Divide each side by '2'.
x2 = 36

Simplifying
x2 = 36

Take the square root of each side:
x = {-6, 6}

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