4(2x^2)-5x^2=300

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Solution for 4(2x^2)-5x^2=300 equation: 


Simplifying
4(2x2) + -5x2 = 300

Remove parenthesis around (2x2)
4 * 2x2 + -5x2 = 300

Multiply 4 * 2
8x2 + -5x2 = 300

Combine like terms: 8x2 + -5x2 = 3x2
3x2 = 300

Solving
3x2 = 300

Solving for variable 'x'.

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

Divide each side by '3'.
x2 = 100

Simplifying
x2 = 100

Take the square root of each side:
x = {-10, 10}

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