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Simplifying
4x2 + 28 = 428
Reorder the terms:
28 + 4x2 = 428
Solving
28 + 4x2 = 428
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 + 4x2 = 428 + -28
Combine like terms: 28 + -28 = 0
0 + 4x2 = 428 + -28
4x2 = 428 + -28
Combine like terms: 428 + -28 = 400
4x2 = 400
Divide each side by '4'.
x2 = 100
Simplifying
x2 = 100
Take the square root of each side:
x = {-10, 10}
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