(8y^2-4y+5)-(y^2+5y-3)=

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Solution for (8y^2-4y+5)-(y^2+5y-3)= equation:


Simplifying
(8y2 + -4y + 5) + -1(y2 + 5y + -3) = 0

Reorder the terms:
(5 + -4y + 8y2) + -1(y2 + 5y + -3) = 0

Remove parenthesis around (5 + -4y + 8y2)
5 + -4y + 8y2 + -1(y2 + 5y + -3) = 0

Reorder the terms:
5 + -4y + 8y2 + -1(-3 + 5y + y2) = 0
5 + -4y + 8y2 + (-3 * -1 + 5y * -1 + y2 * -1) = 0
5 + -4y + 8y2 + (3 + -5y + -1y2) = 0

Reorder the terms:
5 + 3 + -4y + -5y + 8y2 + -1y2 = 0

Combine like terms: 5 + 3 = 8
8 + -4y + -5y + 8y2 + -1y2 = 0

Combine like terms: -4y + -5y = -9y
8 + -9y + 8y2 + -1y2 = 0

Combine like terms: 8y2 + -1y2 = 7y2
8 + -9y + 7y2 = 0

Solving
8 + -9y + 7y2 = 0

Solving for variable 'y'.

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

Divide each side by '7'.
1.142857143 + -1.285714286y + y2 = 0

Move the constant term to the right:

Add '-1.142857143' to each side of the equation.
1.142857143 + -1.285714286y + -1.142857143 + y2 = 0 + -1.142857143

Reorder the terms:
1.142857143 + -1.142857143 + -1.285714286y + y2 = 0 + -1.142857143

Combine like terms: 1.142857143 + -1.142857143 = 0.000000000
0.000000000 + -1.285714286y + y2 = 0 + -1.142857143
-1.285714286y + y2 = 0 + -1.142857143

Combine like terms: 0 + -1.142857143 = -1.142857143
-1.285714286y + y2 = -1.142857143

The y term is -1.285714286y.  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.
-1.285714286y + 0.4132653063 + y2 = -1.142857143 + 0.4132653063

Reorder the terms:
0.4132653063 + -1.285714286y + y2 = -1.142857143 + 0.4132653063

Combine like terms: -1.142857143 + 0.4132653063 = -0.7295918367
0.4132653063 + -1.285714286y + y2 = -0.7295918367

Factor a perfect square on the left side:
(y + -0.642857143)(y + -0.642857143) = -0.7295918367

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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