7x^2+6x+3(x+2)=

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Solution for 7x^2+6x+3(x+2)= equation:


Simplifying
7x2 + 6x + 3(x + 2) = 0

Reorder the terms:
7x2 + 6x + 3(2 + x) = 0
7x2 + 6x + (2 * 3 + x * 3) = 0
7x2 + 6x + (6 + 3x) = 0

Reorder the terms:
6 + 6x + 3x + 7x2 = 0

Combine like terms: 6x + 3x = 9x
6 + 9x + 7x2 = 0

Solving
6 + 9x + 7x2 = 0

Solving for variable 'x'.

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

Divide each side by '7'.
0.8571428571 + 1.285714286x + x2 = 0

Move the constant term to the right:

Add '-0.8571428571' to each side of the equation.
0.8571428571 + 1.285714286x + -0.8571428571 + x2 = 0 + -0.8571428571

Reorder the terms:
0.8571428571 + -0.8571428571 + 1.285714286x + x2 = 0 + -0.8571428571

Combine like terms: 0.8571428571 + -0.8571428571 = 0.0000000000
0.0000000000 + 1.285714286x + x2 = 0 + -0.8571428571
1.285714286x + x2 = 0 + -0.8571428571

Combine like terms: 0 + -0.8571428571 = -0.8571428571
1.285714286x + x2 = -0.8571428571

The x term is 1.285714286x.  Take half its coefficient (0.642857143).
Square it (0.4132653063) and add it to both sides.

Add '0.4132653063' to each side of the equation.
1.285714286x + 0.4132653063 + x2 = -0.8571428571 + 0.4132653063

Reorder the terms:
0.4132653063 + 1.285714286x + x2 = -0.8571428571 + 0.4132653063

Combine like terms: -0.8571428571 + 0.4132653063 = -0.4438775508
0.4132653063 + 1.285714286x + x2 = -0.4438775508

Factor a perfect square on the left side:
(x + 0.642857143)(x + 0.642857143) = -0.4438775508

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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