5x^2+20x+40=100

Solution for 5x^2+20x+40=100 equation:

Simplifying
5x2 + 20x + 40 = 100

Reorder the terms:
40 + 20x + 5x2 = 100

Solving
40 + 20x + 5x2 = 100

Solving for variable 'x'.

Reorder the terms:
40 + -100 + 20x + 5x2 = 100 + -100

Combine like terms: 40 + -100 = -60
-60 + 20x + 5x2 = 100 + -100

Combine like terms: 100 + -100 = 0
-60 + 20x + 5x2 = 0

Factor out the Greatest Common Factor (GCF), '5'.
5(-12 + 4x + x2) = 0

Factor a trinomial.
5((-6 + -1x)(2 + -1x)) = 0

Ignore the factor 5.
Subproblem 1
Set the factor '(-6 + -1x)' equal to zero and attempt to solve:

Simplifying
-6 + -1x = 0

Solving
-6 + -1x = 0

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

Add '6' to each side of the equation.
-6 + 6 + -1x = 0 + 6

Combine like terms: -6 + 6 = 0
0 + -1x = 0 + 6
-1x = 0 + 6

Combine like terms: 0 + 6 = 6
-1x = 6

Divide each side by '-1'.
x = -6

Simplifying
x = -6
Subproblem 2
Set the factor '(2 + -1x)' equal to zero and attempt to solve:

Simplifying
2 + -1x = 0

Solving
2 + -1x = 0

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

Add '-2' to each side of the equation.
2 + -2 + -1x = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -1x = 0 + -2
-1x = 0 + -2

Combine like terms: 0 + -2 = -2
-1x = -2

Divide each side by '-1'.
x = 2

Simplifying
x = 2
Solution
x = {-6, 2}