0.4*x^2+8x+40=-0.6*x^2+60

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Solution for 0.4*x^2+8x+40=-0.6*x^2+60 equation: 


Simplifying
0.4x2 + 8x + 40 = -0.6x2 + 60

Reorder the terms:
40 + 8x + 0.4x2 = -0.6x2 + 60

Reorder the terms:
40 + 8x + 0.4x2 = 60 + -0.6x2

Solving
40 + 8x + 0.4x2 = 60 + -0.6x2

Solving for variable 'x'.

Reorder the terms:
40 + -60 + 8x + 0.4x2 + 0.6x2 = 60 + -0.6x2 + -60 + 0.6x2

Combine like terms: 40 + -60 = -20
-20 + 8x + 0.4x2 + 0.6x2 = 60 + -0.6x2 + -60 + 0.6x2

Combine like terms: 0.4x2 + 0.6x2 = 1x2
-20 + 8x + 1x2 = 60 + -0.6x2 + -60 + 0.6x2

Reorder the terms:
-20 + 8x + 1x2 = 60 + -60 + -0.6x2 + 0.6x2

Combine like terms: 60 + -60 = 0
-20 + 8x + 1x2 = 0 + -0.6x2 + 0.6x2
-20 + 8x + 1x2 = -0.6x2 + 0.6x2

Combine like terms: -0.6x2 + 0.6x2 = 0.0
-20 + 8x + 1x2 = 0.0

Factor a trinomial.
(-10 + -1x)(2 + -1x) = 0.0


Subproblem 1
Set the factor '(-10 + -1x)' equal to zero and attempt to solve:

Simplifying
-10 + -1x = 0

Solving
-10 + -1x = 0

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

Add '10' to each side of the equation.
-10 + 10 + -1x = 0 + 10

Combine like terms: -10 + 10 = 0
0 + -1x = 0 + 10
-1x = 0 + 10

Combine like terms: 0 + 10 = 10
-1x = 10

Divide each side by '-1'.
x = -10

Simplifying
x = -10

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 = {-10, 2}

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