28-7x^2=0

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Solution for 28-7x^2=0 equation: 


Simplifying
28 + -7x2 = 0

Solving
28 + -7x2 = 0

Solving for variable 'x'.

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

Add '-28' to each side of the equation.
28 + -28 + -7x2 = 0 + -28

Combine like terms: 28 + -28 = 0
0 + -7x2 = 0 + -28
-7x2 = 0 + -28

Combine like terms: 0 + -28 = -28
-7x2 = -28

Divide each side by '-7'.
x2 = 4

Simplifying
x2 = 4

Take the square root of each side:
x = {-2, 2}

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