(7x^2-5x+3)-(5x^2-4)=

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Solution for (7x^2-5x+3)-(5x^2-4)= equation:


Simplifying
(7x2 + -5x + 3) + -1(5x2 + -4) = 0

Reorder the terms:
(3 + -5x + 7x2) + -1(5x2 + -4) = 0

Remove parenthesis around (3 + -5x + 7x2)
3 + -5x + 7x2 + -1(5x2 + -4) = 0

Reorder the terms:
3 + -5x + 7x2 + -1(-4 + 5x2) = 0
3 + -5x + 7x2 + (-4 * -1 + 5x2 * -1) = 0
3 + -5x + 7x2 + (4 + -5x2) = 0

Reorder the terms:
3 + 4 + -5x + 7x2 + -5x2 = 0

Combine like terms: 3 + 4 = 7
7 + -5x + 7x2 + -5x2 = 0

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

Solving
7 + -5x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
3.5 + -2.5x + x2 = 0

Move the constant term to the right:

Add '-3.5' to each side of the equation.
3.5 + -2.5x + -3.5 + x2 = 0 + -3.5

Reorder the terms:
3.5 + -3.5 + -2.5x + x2 = 0 + -3.5

Combine like terms: 3.5 + -3.5 = 0.0
0.0 + -2.5x + x2 = 0 + -3.5
-2.5x + x2 = 0 + -3.5

Combine like terms: 0 + -3.5 = -3.5
-2.5x + x2 = -3.5

The x term is -2.5x.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5x + 1.5625 + x2 = -3.5 + 1.5625

Reorder the terms:
1.5625 + -2.5x + x2 = -3.5 + 1.5625

Combine like terms: -3.5 + 1.5625 = -1.9375
1.5625 + -2.5x + x2 = -1.9375

Factor a perfect square on the left side:
(x + -1.25)(x + -1.25) = -1.9375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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