(7X^2+4X-8)+(6X^2-2X+9)=

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Solution for (7X^2+4X-8)+(6X^2-2X+9)= equation:


Simplifying
(7X2 + 4X + -8) + (6X2 + -2X + 9) = 0

Reorder the terms:
(-8 + 4X + 7X2) + (6X2 + -2X + 9) = 0

Remove parenthesis around (-8 + 4X + 7X2)
-8 + 4X + 7X2 + (6X2 + -2X + 9) = 0

Reorder the terms:
-8 + 4X + 7X2 + (9 + -2X + 6X2) = 0

Remove parenthesis around (9 + -2X + 6X2)
-8 + 4X + 7X2 + 9 + -2X + 6X2 = 0

Reorder the terms:
-8 + 9 + 4X + -2X + 7X2 + 6X2 = 0

Combine like terms: -8 + 9 = 1
1 + 4X + -2X + 7X2 + 6X2 = 0

Combine like terms: 4X + -2X = 2X
1 + 2X + 7X2 + 6X2 = 0

Combine like terms: 7X2 + 6X2 = 13X2
1 + 2X + 13X2 = 0

Solving
1 + 2X + 13X2 = 0

Solving for variable 'X'.

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

Divide each side by '13'.
0.07692307692 + 0.1538461538X + X2 = 0

Move the constant term to the right:

Add '-0.07692307692' to each side of the equation.
0.07692307692 + 0.1538461538X + -0.07692307692 + X2 = 0 + -0.07692307692

Reorder the terms:
0.07692307692 + -0.07692307692 + 0.1538461538X + X2 = 0 + -0.07692307692

Combine like terms: 0.07692307692 + -0.07692307692 = 0.00000000000
0.00000000000 + 0.1538461538X + X2 = 0 + -0.07692307692
0.1538461538X + X2 = 0 + -0.07692307692

Combine like terms: 0 + -0.07692307692 = -0.07692307692
0.1538461538X + X2 = -0.07692307692

The X term is 0.1538461538X.  Take half its coefficient (0.0769230769).
Square it (0.005917159760) and add it to both sides.

Add '0.005917159760' to each side of the equation.
0.1538461538X + 0.005917159760 + X2 = -0.07692307692 + 0.005917159760

Reorder the terms:
0.005917159760 + 0.1538461538X + X2 = -0.07692307692 + 0.005917159760

Combine like terms: -0.07692307692 + 0.005917159760 = -0.07100591716
0.005917159760 + 0.1538461538X + X2 = -0.07100591716

Factor a perfect square on the left side:
(X + 0.0769230769)(X + 0.0769230769) = -0.07100591716

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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