Question

If (x³-y³):(x²+xy+y²)=5:1 and (x²-y²):(x-y)=7:1 then the ratio 2x:3y equal to

Answer 1

Answer:

Step-by-step explanation:

x3-y3/(x2+xy+y2)=5/1

(x-y)(x2+xy+y2)/(x2+xy+y2)=5

x-y=5. Equation 1

x2-y2/x-y=7/1

(x+y)(x-y)/(x-y)=7

x+y=7. Eqn.2

From eqn.1&2 we get

2x=12

x=6

y=1

2x:3y=

2*6:3*1

12:3=

4:1(Ans.)

Hope this helps