2x^2+x^2+8=480

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Solution for 2x^2+x^2+8=480 equation: 


Simplifying
2x2 + x2 + 8 = 480

Reorder the terms:
8 + 2x2 + x2 = 480

Combine like terms: 2x2 + x2 = 3x2
8 + 3x2 = 480

Solving
8 + 3x2 = 480

Solving for variable 'x'.

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

Add '-8' to each side of the equation.
8 + -8 + 3x2 = 480 + -8

Combine like terms: 8 + -8 = 0
0 + 3x2 = 480 + -8
3x2 = 480 + -8

Combine like terms: 480 + -8 = 472
3x2 = 472

Divide each side by '3'.
x2 = 157.3333333

Simplifying
x2 = 157.3333333

Take the square root of each side:
x = {-12.54325848, 12.54325848}

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