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Simplifying
4x2 + 5 = 905
Reorder the terms:
5 + 4x2 = 905
Solving
5 + 4x2 = 905
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-5' to each side of the equation.
5 + -5 + 4x2 = 905 + -5
Combine like terms: 5 + -5 = 0
0 + 4x2 = 905 + -5
4x2 = 905 + -5
Combine like terms: 905 + -5 = 900
4x2 = 900
Divide each side by '4'.
x2 = 225
Simplifying
x2 = 225
Take the square root of each side:
x = {-15, 15}
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