Question

4. Expand (5p-3p)cube​

Answer 1

the question is wrong

there is ( 5p - 3q ) cube

Ans (5p-3q)

identity = ( a-b )cube = a3 - y3 - 3xy ( x-y )

= a3 - 3x2y + 3xy2 - y2

( 5p - 3q )

( 5p )3 - (3q)3 - 3 × 5p × 3q (5p - 3q )

125p3 - 27 q3 - 45pq (5p) - 45pq (-3q)

125p3 - 27q3 - 225p2q + 135p2q