Question

explain how can they do this question's solution ?​

Answer 1

I hope so it will be useful for you

Answer 2

hey mate here is your answer :

1 ) first make the 2 expressions equal

change the 1st expression ( multiply the 1st equation ). 5m(3-m) = 5m×3 = 15m, 5m × [ - ]m=5m^2

if there is a number out side the bracket then we think that is a multiplication.Now add two equations

15m-5m^2

-13m+6m^2

02m+1m^2 ( answer )

here ( + ) × ( - ) = -

here which number big we put that symbol

this like only 2nd answer also............... Do it your own then only you will understand your question