Question

factorise 5(3x-5y)²-20(2x-y)²

Answer 1

Answer

5a^2-20b^2

5(a^2-4b^2)

put the values and solve it.

Step-by-step explanation:

first let 3x-5y=a , 2x-y=b

then the equation be 5a^2-20b^2

at last, take 5 common.

this is the answer.