5X^2-2X=-7

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Solution for 5X^2-2X=-7 equation:


Simplifying
5X2 + -2X = -7

Reorder the terms:
-2X + 5X2 = -7

Solving
-2X + 5X2 = -7

Solving for variable 'X'.

Reorder the terms:
7 + -2X + 5X2 = -7 + 7

Combine like terms: -7 + 7 = 0
7 + -2X + 5X2 = 0

Begin completing the square.  Divide all terms by
5 the coefficient of the squared term: 

Divide each side by '5'.
1.4 + -0.4X + X2 = 0

Move the constant term to the right:

Add '-1.4' to each side of the equation.
1.4 + -0.4X + -1.4 + X2 = 0 + -1.4

Reorder the terms:
1.4 + -1.4 + -0.4X + X2 = 0 + -1.4

Combine like terms: 1.4 + -1.4 = 0.0
0.0 + -0.4X + X2 = 0 + -1.4
-0.4X + X2 = 0 + -1.4

Combine like terms: 0 + -1.4 = -1.4
-0.4X + X2 = -1.4

The X term is -0.4X.  Take half its coefficient (-0.2).
Square it (0.04) and add it to both sides.

Add '0.04' to each side of the equation.
-0.4X + 0.04 + X2 = -1.4 + 0.04

Reorder the terms:
0.04 + -0.4X + X2 = -1.4 + 0.04

Combine like terms: -1.4 + 0.04 = -1.36
0.04 + -0.4X + X2 = -1.36

Factor a perfect square on the left side:
(X + -0.2)(X + -0.2) = -1.36

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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