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Simplifying
5(x2 + -4) + 4 = 45
Reorder the terms:
5(-4 + x2) + 4 = 45
(-4 * 5 + x2 * 5) + 4 = 45
(-20 + 5x2) + 4 = 45
Reorder the terms:
-20 + 4 + 5x2 = 45
Combine like terms: -20 + 4 = -16
-16 + 5x2 = 45
Solving
-16 + 5x2 = 45
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '16' to each side of the equation.
-16 + 16 + 5x2 = 45 + 16
Combine like terms: -16 + 16 = 0
0 + 5x2 = 45 + 16
5x2 = 45 + 16
Combine like terms: 45 + 16 = 61
5x2 = 61
Divide each side by '5'.
x2 = 12.2
Simplifying
x2 = 12.2
Take the square root of each side:
x = {-3.492849839, 3.492849839}
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