X^2+42x+400=0

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Solution for X^2+42x+400=0 equation:


Simplifying
X2 + 42x + 400 = 0

Reorder the terms:
400 + X2 + 42x = 0

Solving
400 + X2 + 42x = 0

Solving for variable 'X'.

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

Add '-400' to each side of the equation.
400 + X2 + -400 + 42x = 0 + -400

Reorder the terms:
400 + -400 + X2 + 42x = 0 + -400

Combine like terms: 400 + -400 = 0
0 + X2 + 42x = 0 + -400
X2 + 42x = 0 + -400

Combine like terms: 0 + -400 = -400
X2 + 42x = -400

Add '-42x' to each side of the equation.
X2 + 42x + -42x = -400 + -42x

Combine like terms: 42x + -42x = 0
X2 + 0 = -400 + -42x
X2 = -400 + -42x

Simplifying
X2 = -400 + -42x

Reorder the terms:
400 + X2 + 42x = -400 + -42x + 400 + 42x

Reorder the terms:
400 + X2 + 42x = -400 + 400 + -42x + 42x

Combine like terms: -400 + 400 = 0
400 + X2 + 42x = 0 + -42x + 42x
400 + X2 + 42x = -42x + 42x

Combine like terms: -42x + 42x = 0
400 + X2 + 42x = 0

The solution to this equation could not be determined.

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