X^2+.4x-.21=0

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Solution for X^2+.4x-.21=0 equation:


Simplifying
X2 + 0.4x + -0.21 = 0

Reorder the terms:
-0.21 + X2 + 0.4x = 0

Solving
-0.21 + X2 + 0.4x = 0

Solving for variable 'X'.

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

Add '0.21' to each side of the equation.
-0.21 + X2 + 0.21 + 0.4x = 0 + 0.21

Reorder the terms:
-0.21 + 0.21 + X2 + 0.4x = 0 + 0.21

Combine like terms: -0.21 + 0.21 = 0.00
0.00 + X2 + 0.4x = 0 + 0.21
X2 + 0.4x = 0 + 0.21

Combine like terms: 0 + 0.21 = 0.21
X2 + 0.4x = 0.21

Add '-0.4x' to each side of the equation.
X2 + 0.4x + -0.4x = 0.21 + -0.4x

Combine like terms: 0.4x + -0.4x = 0.0
X2 + 0.0 = 0.21 + -0.4x
X2 = 0.21 + -0.4x

Simplifying
X2 = 0.21 + -0.4x

Reorder the terms:
-0.21 + X2 + 0.4x = 0.21 + -0.4x + -0.21 + 0.4x

Reorder the terms:
-0.21 + X2 + 0.4x = 0.21 + -0.21 + -0.4x + 0.4x

Combine like terms: 0.21 + -0.21 = 0.00
-0.21 + X2 + 0.4x = 0.00 + -0.4x + 0.4x
-0.21 + X2 + 0.4x = -0.4x + 0.4x

Combine like terms: -0.4x + 0.4x = 0.0
-0.21 + X2 + 0.4x = 0.0

The solution to this equation could not be determined.

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