CSEC Maths - Simplifying Algebraic Fractions

[@cheriseh.5142]

On the Jan 1997 paper two, please explain why you changed everything in the bracket to negative.

[@ayannalewis8470]

2k/3 + 2-k/5 the L, c, m of 5 is 5, 10, 15,20 and L, c, m of 3 is 3, 6 , 9, 12, 15 the lowest term is 15 so we say 15 into 3 5 multiply by the numerator which (2k )=10 so you put 10k + 15into 3 is 3 multiply by the numerator which is (2-k)= 6-3k which mean 3 multiply by 2 is 6 and and 3 multiply by k is = 3k= 10 + -6-3k/15 = 10-3 =7+6/15

[@ayannalewis8470]

a/5+ 3a/2 first you have to find the L, C, M which is lowest common multiples so the multiples of. 5 is 5, 10, 15, 20 and multiples of 2 is. 2, 4 , 6,8 10 in that the lowest term is 10 = 5 into 10 is 2a put back the signs and 10 into 2 = 5 multiply by the numerator 5×3= 15 so them 15+2= 17/10

[@BRANTHRAL_MEDIA]

Thanks you for helping me🙃

[@faithgeorge9771]

for june 2002 question can you explain how 3y -2y give us y? cause im kinda lost there

[@CSECMathematics]

It's like saying you have 3 apples and you give away 2 appples. You are simply left with 1 apple

[@faithgeorge9771]

@@CSECMathematics thank you

[@number1musketeer]

y=1 y+y=2y

[@mantosh56]

Thank u it was really helpful :)

[@CSECMathematics]

Glad it helped!

[@sharonamartin4650]

the june 02 paper 2 question, your answer could break down to the numerator being y-3 right seing it said simplify and the denominator 2 could go in the 6,and what if i have my ans as y-3/y2 as in y(square)is that incorrect?

[@ayannalewis8470]

3p/2 + p/p. First you find the L, C, M which is 2p/2= p(3p)=3p = 2/p=2(q)2q so we cannot express small than this is my answer

[@ayannalewis8470]

X-2/3+ x +1/4 first have to find the L, c , m 3, 6 9, 12 , 15 L, c , m 4 is. 4, 8 12 , 16 so my lowest term is 12 = 12 into 3 is 4 multiply 4 by the numerator which (x-2)= 4x2= 8= 4x+8 (3x+3)/12 into 4 is 3 multiply by the numerator (x+1)=3x+3 = 4x -8+ (3x+3) = 4x +3x = 7x, -8+3x-5 = 7x -5/12

[@ownitervi241]

Thanks for this!

[@ayannalewis8470]

Afternoon sir

[@SuperJemser]

Question,,,, If cross multiplied, answer becomes 7x-5... Is it necessary to have that answer over the LCM, or is 7x-5 correct on its own?? Or, does it depend on the way the question is written. It doesn't say answer in fraction form??? Sorry, I am just curious, I am 76 and learning math from the Internet......

[@moreshamatthews3933]

Thank u

[@vitz6793]

thanks dude

[@tiyanatownsend5686]

so helpful

[@shanny_yaadie2793]

thank you sm

[@poojagokool6462]

Why didn't you cross of the y's

[@helloackiee8676]

the first answer won't be 17a(squared) since 2α+15α=17

[@helloackiee8676]

??

[@CSECMathematics]

+A Johnson No we are not multiplying. We are adding two terms in a. Thing of it as adding two apples and 15 apples. The answer will be 17 apples. NOT 17 apples squared.

[@helloackiee8676]

+CSEC Mathematics OK ty

[@helloackiee8676]

+A Johnson will the video with vectors be out before Tuesday Mr Terry?

[@CSECMathematics]

+A Johnson I've already uploaded a video on vectors and matrices. These videos will help with any question on those topics in section 1 of the paper.

[@jcrich_tv1031]

God help me today