Question

What should be multiplied to -7xy to obtain -14x2y2 + 21xy?
1​

Answer 1

Answer:

2xy-3

Step-by-step explanation:

Given

-7xy is multiplied by a number

We then get -14x²y²+21xy

Let the value be 'a'

-7xy×a=-14x²y²+21xy

a= (-14x²y²+21xy)/-7xy

a= -(14x²y²-21xy)/-7xy (if we take minus common)

minus gets cancelled

a=(14x²y²-21xy)/7xy

If we take xy and 7 common

a=7xy(2xy-3)/7xy

7xy gets cancelled we get

a=2xy-3

Therefore if we multiply -7xy with 2xy-3 then we get -14x²y²+21xy