A few days ago

soccermom71968

Algebra help homework help.?

add the following polynomial fractions

(a – 1)/(a + 1)+(a + 1)/(a – 1)

Top 4 Answers

A few days ago

Justin B

Favorite Answer

you have to make a common denominator, which would be (a+1)(a-1).

Multiplying each term by wahtever it’s missing you get:

(a-1)(a-1) + (a+1)(a+1)

——————————-

(a+1)(a-1)

There’s no common terms, so you have to just expand and cancel out

a^2 – 2a + 1 + a^2 + 2a + 1

————————————-

(a+1)(a-1)

2a^2 +2 (the 2a’s cancel)

———–

2a^2 – 1

A few days ago

sayamiam

multiply through by common denominator: (a+1)(a-1)

to get: ((a-1)^2+(a+1)^2)/(a+1)(a-1)

(a^2-2a+1+a^2+2a+1)/(a^2-1)= 2(a^2+1)/(a^2-1)

A few days ago

ilovexspin

i got 2a/a^2-1

A few days ago

Jami

(2a^2)/((a+1)(a-1))

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