math
I have a couple of math questions that i cant seem to get to work out. can someone help me please.?
1.)
(x/x+6)-(6/x-6)=(x^2+36)/(x^2-36)
2.)
(r-2)-(2-r)=0
3.) add
(8/ty^2)+(9/t^2y)
4.)add
(7/w)+(8/w^2)
5.)add
((r+10)/r)+(r/(r+10))
6.) divide
((z^2-1)/16z+16) / ((z-1)/4)
7.) find LCM
11(t-7) and 77(t-7)
8.) remove factors of 1
w^2-9 / 3-w
9.) divide and simplify
((d+2)/(d-4))/((8d+16)/(d-5))
I know that there are alot of questions but these are the one's that for some reason i just cant get to work out.
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Answers
1.) x/x+6 - 6/x-6 = (x^2+36)/(x^2-36) Multiply both sides by (x^2 - 36): x^2 - 6x - 6x - 36 = x^2 + 36 Simplify: -12x = 0 Therefore, x = 0 2.) r - 2 - 2 + r = 0 Simplify: 2r - 4 = 0 Therefore, r = 2 3.) (8/ty^2) + (9/t^2y) = (8t + 9)/t^2y 4.) (7/w) + (8/w^2) = (7w + 8)/w^2 5.) ((r + 10)/r) + (r/(r + 10)) = (r^2 + 10r + 10r + 100)/(r^2 + 10r) 6.) ((z^2-1)/(16z+16)) / ((z-1)/4) = (z^2 - 1)(4)/(16z + 16)(z - 1) Simplify: (z - 1)/(64z + 64) 7.) LCM of 11(t-7) and 77(t
