I need help to factor and I don't know how to check it by multiplying.

Mathematics
Tutor: None Selected Time limit: 1 Day

Aug 8th, 2015

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31) 9y+21 =3(3y+7)

32) 14a+35b  =7(2a+5b)

33)3x+21y+12z =3(x+7y+4z)

34)7m+42n=7(m+6n)

35) 10c+c =11c

36)9+21z =3(3+7z)

37)8a+6b+10c =2(4a+3b+5c)

38) 10x+25y+30 =5(2x+5y+6)

39)36+72s+4t =4(9+18s+t)



Please let me know if you need any clarification. I'm always happy to answer your questions.
Aug 8th, 2015

Hi, thank you so much, I would also like to know how to check with multiplication is that's possible? Thank you.

Aug 8th, 2015

thats simple, you have to multiply factors to get the original product


31) 3(3y+7) =   here multiply 3 to 3y and 7 and add

                   =9y+21

do this to all above examples.

Aug 9th, 2015

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