0=4x^2+80x+400

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Solution for 0=4x^2+80x+400 equation:


Simplifying
0 = 4x2 + 80x + 400

Reorder the terms:
0 = 400 + 80x + 4x2

Solving
0 = 400 + 80x + 4x2

Solving for variable 'x'.

Combine like terms: 0 + -400 = -400
-400 + -80x + -4x2 = 400 + 80x + 4x2 + -400 + -80x + -4x2

Reorder the terms:
-400 + -80x + -4x2 = 400 + -400 + 80x + -80x + 4x2 + -4x2

Combine like terms: 400 + -400 = 0
-400 + -80x + -4x2 = 0 + 80x + -80x + 4x2 + -4x2
-400 + -80x + -4x2 = 80x + -80x + 4x2 + -4x2

Combine like terms: 80x + -80x = 0
-400 + -80x + -4x2 = 0 + 4x2 + -4x2
-400 + -80x + -4x2 = 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
-400 + -80x + -4x2 = 0

Factor out the Greatest Common Factor (GCF), '-4'.
-4(100 + 20x + x2) = 0

Factor a trinomial.
-4((10 + x)(10 + x)) = 0

Ignore the factor -4.

Subproblem 1

Set the factor '(10 + x)' equal to zero and attempt to solve: Simplifying 10 + x = 0 Solving 10 + x = 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 + x = 0 + -10 Combine like terms: 10 + -10 = 0 0 + x = 0 + -10 x = 0 + -10 Combine like terms: 0 + -10 = -10 x = -10 Simplifying x = -10

Subproblem 2

Set the factor '(10 + x)' equal to zero and attempt to solve: Simplifying 10 + x = 0 Solving 10 + x = 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 + x = 0 + -10 Combine like terms: 10 + -10 = 0 0 + x = 0 + -10 x = 0 + -10 Combine like terms: 0 + -10 = -10 x = -10 Simplifying x = -10

Solution

x = {-10, -10}

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