3X^2+7X=-9

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Solution for 3X^2+7X=-9 equation:


Simplifying
3X2 + 7X = -9

Reorder the terms:
7X + 3X2 = -9

Solving
7X + 3X2 = -9

Solving for variable 'X'.

Reorder the terms:
9 + 7X + 3X2 = -9 + 9

Combine like terms: -9 + 9 = 0
9 + 7X + 3X2 = 0

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

Divide each side by '3'.
3 + 2.333333333X + X2 = 0

Move the constant term to the right:

Add '-3' to each side of the equation.
3 + 2.333333333X + -3 + X2 = 0 + -3

Reorder the terms:
3 + -3 + 2.333333333X + X2 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + 2.333333333X + X2 = 0 + -3
2.333333333X + X2 = 0 + -3

Combine like terms: 0 + -3 = -3
2.333333333X + X2 = -3

The X term is 2.333333333X.  Take half its coefficient (1.166666667).
Square it (1.361111112) and add it to both sides.

Add '1.361111112' to each side of the equation.
2.333333333X + 1.361111112 + X2 = -3 + 1.361111112

Reorder the terms:
1.361111112 + 2.333333333X + X2 = -3 + 1.361111112

Combine like terms: -3 + 1.361111112 = -1.638888888
1.361111112 + 2.333333333X + X2 = -1.638888888

Factor a perfect square on the left side:
(X + 1.166666667)(X + 1.166666667) = -1.638888888

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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