Question

factorise 125x^2-9y^2

Answer 1

Answer:

( 5x +3y ) (5x-3y)

Step-by-step explanation:

= 25x^2 - 9y^2

= (5x)^2 - ( 3y)^2

since it is in the form of a^2 -b^2 .

Write it in (a+b) (a-b) format

where a = 5x and b = 3y

= (5x+3y) ( 5x-3y)