(y+9)2-(y-5)2=28

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Solution for (y+9)2-(y-5)2=28 equation:


Simplifying
(y + 9) * 2 + -1(y + -5) * 2 = 28

Reorder the terms:
(9 + y) * 2 + -1(y + -5) * 2 = 28

Reorder the terms for easier multiplication:
2(9 + y) + -1(y + -5) * 2 = 28
(9 * 2 + y * 2) + -1(y + -5) * 2 = 28
(18 + 2y) + -1(y + -5) * 2 = 28

Reorder the terms:
18 + 2y + -1(-5 + y) * 2 = 28

Reorder the terms for easier multiplication:
18 + 2y + -1 * 2(-5 + y) = 28

Multiply -1 * 2
18 + 2y + -2(-5 + y) = 28
18 + 2y + (-5 * -2 + y * -2) = 28
18 + 2y + (10 + -2y) = 28

Reorder the terms:
18 + 10 + 2y + -2y = 28

Combine like terms: 18 + 10 = 28
28 + 2y + -2y = 28

Combine like terms: 2y + -2y = 0
28 + 0 = 28
28 = 28

Add '-28' to each side of the equation.
28 + -28 = 28 + -28

Combine like terms: 28 + -28 = 0
0 = 28 + -28

Combine like terms: 28 + -28 = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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