Question

factorise

(64m^2- 144mn +81n^2) - 25p^2​

Answer 1

((8m)^2 - 2*8*9mn + (9n)^2) - (5p)^2

= ( 8m - 9n )^2 - ( 5p )^2

since a^2 - b^2 = ( a + b )(a - b )

= ( 8m - 9n + 5p ) ( 8m - 9n - 5p) ans