(8y^2-5y+7)-(9y^2-5y+9)=

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Solution for (8y^2-5y+7)-(9y^2-5y+9)= equation:


Simplifying
(8y2 + -5y + 7) + -1(9y2 + -5y + 9) = 0

Reorder the terms:
(7 + -5y + 8y2) + -1(9y2 + -5y + 9) = 0

Remove parenthesis around (7 + -5y + 8y2)
7 + -5y + 8y2 + -1(9y2 + -5y + 9) = 0

Reorder the terms:
7 + -5y + 8y2 + -1(9 + -5y + 9y2) = 0
7 + -5y + 8y2 + (9 * -1 + -5y * -1 + 9y2 * -1) = 0
7 + -5y + 8y2 + (-9 + 5y + -9y2) = 0

Reorder the terms:
7 + -9 + -5y + 5y + 8y2 + -9y2 = 0

Combine like terms: 7 + -9 = -2
-2 + -5y + 5y + 8y2 + -9y2 = 0

Combine like terms: -5y + 5y = 0
-2 + 0 + 8y2 + -9y2 = 0
-2 + 8y2 + -9y2 = 0

Combine like terms: 8y2 + -9y2 = -1y2
-2 + -1y2 = 0

Solving
-2 + -1y2 = 0

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '2' to each side of the equation.
-2 + 2 + -1y2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -1y2 = 0 + 2
-1y2 = 0 + 2

Combine like terms: 0 + 2 = 2
-1y2 = 2

Divide each side by '-1'.
y2 = -2

Simplifying
y2 = -2

Reorder the terms:
2 + y2 = -2 + 2

Combine like terms: -2 + 2 = 0
2 + y2 = 0

The solution to this equation could not be determined.

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