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3 years ago

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4/y+2 - 9/y-2 = 9/y^2-4

2 answers:

Evgesh-ka [11]3 years ago

8 0

Going off the idea that this is 4/(y+2) - 9/(y-2) = 9/(y^2-4), let's first rewrite y^2-4 in the form of a^2-b^2, where a=y and b=2.
y/(y+2)-9/(y-2)=9/(y^2-2^2)
Now, use difference of squares: a^2-b^2=(a+b)(a-b)
4/(y+2)-9/(y-2)=9/((y+2)(y-2))
Multiply both sides by the Least Common Denominator: (y+2)(y-2)
4(y-2)-9(y+2)=9
Then keep on simplifying until you get your answer
-5y-26=9
-5y=9+26
-5y=35
y=35/-5
y=-7
Yay! Our answer is y=-7!

tangare [24]3 years ago

6 0

The answer y =-7
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2 years ago

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3 years ago

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3 years ago

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Answer:

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Given

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Required

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3 years ago