Help > Math > Algebra 1 > "3 questions I can't solve."
Please show your working because I can't figure out if it's me or the answers wrong? Thx
factor
Solved. How? Well ...
With h. One has to first factor the 8p + 2pq (denominator). Then one can eliminate common terms. That's how one is left with 4 + q (after factoring). If I forget to factor first, then I can get an answer that might feel right but isn't.
Woth C, we need to factor the numerator first. The denominator is already factored.
Last is the one in black and white. Both the numerator and the denominator can be factored. Then, we can solve by eliminated common terms. That's why we get a 1 + 2b as the correct answer.
My lesson from this is that it's good to keep up with learning. These questions were from a textbook I'm using to supplement my education.
Dinesh was right. "factor".
H.
1. for this equation we have 12p/(8p+2pq)
2. factor denominator
8p+2pq -> 2p(4+q)
we now have 12p/(2p(4+q))
3. simplify
12p/2p(4+q)
4. we now have 6/(4+q)
bottom right problem.
1. factor out "a" from both expressions
(3ac+5a)/(a+2ab) -> (a(3c+5))/(a(1+2b))
2. notice that because "a"is factoring out itself, we place a "1" because a(1)=a, hence "1+2b"
3. simplify
(a(3c+5))/(a(1+2b))
we now have (3c+5)/(1+2b)
C.
1. factor numerator
((7x^2y)-(5x^2y))/12xy
7x^2y -> 7x(xy)
5x^y->5x(xy)
2. we can now factor out (xy) from both the numerator and denominator
(7x(xy)-5x(xy))/12xy
we are left with
(7x-5x)/12
3. simplify
2x/12 -> x/6
4. we now have x/6
hope this helps
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