3x+2x(7-5x)=12

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Solution for 3x+2x(7-5x)=12 equation:


Simplifying
3x + 2x(7 + -5x) = 12
3x + (7 * 2x + -5x * 2x) = 12
3x + (14x + -10x2) = 12

Combine like terms: 3x + 14x = 17x
17x + -10x2 = 12

Solving
17x + -10x2 = 12

Solving for variable 'x'.

Reorder the terms:
-12 + 17x + -10x2 = 12 + -12

Combine like terms: 12 + -12 = 0
-12 + 17x + -10x2 = 0

Begin completing the square.  Divide all terms by
-10 the coefficient of the squared term: 

Divide each side by '-10'.
1.2 + -1.7x + x2 = 0.0

Move the constant term to the right:

Add '-1.2' to each side of the equation.
1.2 + -1.7x + -1.2 + x2 = 0.0 + -1.2

Reorder the terms:
1.2 + -1.2 + -1.7x + x2 = 0.0 + -1.2

Combine like terms: 1.2 + -1.2 = 0.0
0.0 + -1.7x + x2 = 0.0 + -1.2
-1.7x + x2 = 0.0 + -1.2

Combine like terms: 0.0 + -1.2 = -1.2
-1.7x + x2 = -1.2

The x term is -1.7x.  Take half its coefficient (-0.85).
Square it (0.7225) and add it to both sides.

Add '0.7225' to each side of the equation.
-1.7x + 0.7225 + x2 = -1.2 + 0.7225

Reorder the terms:
0.7225 + -1.7x + x2 = -1.2 + 0.7225

Combine like terms: -1.2 + 0.7225 = -0.4775
0.7225 + -1.7x + x2 = -0.4775

Factor a perfect square on the left side:
(x + -0.85)(x + -0.85) = -0.4775

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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