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Simplifying
3x2 + 4x + 5 = x2 + 4x + 23
Reorder the terms:
5 + 4x + 3x2 = x2 + 4x + 23
Reorder the terms:
5 + 4x + 3x2 = 23 + 4x + x2
Add '-4x' to each side of the equation.
5 + 4x + -4x + 3x2 = 23 + 4x + -4x + x2
Combine like terms: 4x + -4x = 0
5 + 0 + 3x2 = 23 + 4x + -4x + x2
5 + 3x2 = 23 + 4x + -4x + x2
Combine like terms: 4x + -4x = 0
5 + 3x2 = 23 + 0 + x2
5 + 3x2 = 23 + x2
Solving
5 + 3x2 = 23 + x2
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-1x2' to each side of the equation.
5 + 3x2 + -1x2 = 23 + x2 + -1x2
Combine like terms: 3x2 + -1x2 = 2x2
5 + 2x2 = 23 + x2 + -1x2
Combine like terms: x2 + -1x2 = 0
5 + 2x2 = 23 + 0
5 + 2x2 = 23
Add '-5' to each side of the equation.
5 + -5 + 2x2 = 23 + -5
Combine like terms: 5 + -5 = 0
0 + 2x2 = 23 + -5
2x2 = 23 + -5
Combine like terms: 23 + -5 = 18
2x2 = 18
Divide each side by '2'.
x2 = 9
Simplifying
x2 = 9
Take the square root of each side:
x = {-3, 3}
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