(7x^2-4x+6)-(2x^2+3x-10)=

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Solution for (7x^2-4x+6)-(2x^2+3x-10)= equation:


Simplifying
(7x2 + -4x + 6) + -1(2x2 + 3x + -10) = 0

Reorder the terms:
(6 + -4x + 7x2) + -1(2x2 + 3x + -10) = 0

Remove parenthesis around (6 + -4x + 7x2)
6 + -4x + 7x2 + -1(2x2 + 3x + -10) = 0

Reorder the terms:
6 + -4x + 7x2 + -1(-10 + 3x + 2x2) = 0
6 + -4x + 7x2 + (-10 * -1 + 3x * -1 + 2x2 * -1) = 0
6 + -4x + 7x2 + (10 + -3x + -2x2) = 0

Reorder the terms:
6 + 10 + -4x + -3x + 7x2 + -2x2 = 0

Combine like terms: 6 + 10 = 16
16 + -4x + -3x + 7x2 + -2x2 = 0

Combine like terms: -4x + -3x = -7x
16 + -7x + 7x2 + -2x2 = 0

Combine like terms: 7x2 + -2x2 = 5x2
16 + -7x + 5x2 = 0

Solving
16 + -7x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
3.2 + -1.4x + x2 = 0

Move the constant term to the right:

Add '-3.2' to each side of the equation.
3.2 + -1.4x + -3.2 + x2 = 0 + -3.2

Reorder the terms:
3.2 + -3.2 + -1.4x + x2 = 0 + -3.2

Combine like terms: 3.2 + -3.2 = 0.0
0.0 + -1.4x + x2 = 0 + -3.2
-1.4x + x2 = 0 + -3.2

Combine like terms: 0 + -3.2 = -3.2
-1.4x + x2 = -3.2

The x term is -1.4x.  Take half its coefficient (-0.7).
Square it (0.49) and add it to both sides.

Add '0.49' to each side of the equation.
-1.4x + 0.49 + x2 = -3.2 + 0.49

Reorder the terms:
0.49 + -1.4x + x2 = -3.2 + 0.49

Combine like terms: -3.2 + 0.49 = -2.71
0.49 + -1.4x + x2 = -2.71

Factor a perfect square on the left side:
(x + -0.7)(x + -0.7) = -2.71

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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