prob== Solve by factoring:

4m^2+7m=0

Answer is == m(4m+7)

but how do I solve to allow each factor to zero? please show me. thanks

Question

prob==>  Solve by factoring:

4m^2+7m=0

Answer is ==>  m(4m+7)

but how do I solve to allow each factor to zero? please show me. thanks

parthkohli · Answer

Now use the zero-product rule.

$ \color{Black}{\Rightarrow m = 0 }$

$ \color{Black}{\Rightarrow 4m + 7 = 0 }$

Solve these two ^ and you get your two solutions I believe ^.^

anonymous · Answer

i don't get what you mean. you let the factors equal to zero so you get m = 0 and 4m + 7 = 0. solve for m for both cases.

anonymous · Answer

where are you getting confused?

anonymous · Answer

yes getting there confused

anonymous · Answer

you know how m(4m+7) was got right?

parthkohli · Answer

Umm, so now is it easy for you to do it?

anonymous · Answer

if we have: a.b = 0; so we have:
a = 0 or b = 0;
so on this case: m(4m+7) = 0, you can let m = a and 4m+7 = b;
so we have m=0 and 4m+7=0
so is it easy for you now?

anonymous · Answer

I understand now seeings how you made it a=0 etc. thanks it makes sence now

parthkohli · Answer

Why didn't you ask us if you wanted to understand this?