Question

expand (5p - 3q )³
by using identities ​

Answer 1

Answer:

Using the identity

(x - y)3 = x3 - 3x2y + 3xy2 - y3 we get

(5p - 3q)3 = (5p)3-3(5p)2(3q)+3(5p)(3q)2-(3q)3

= 125p3 - 225p2q + 135pq2 - 27q3

Answer 2

Given

• expand (5p - 3q )³ by using identities

SolutioN

• (5p-3q)=(5p)^3-(3q)^3-3(5p)(3q)
• (5p-3q)
• = 125p^3-27q^3-225p^2q
• +135pq^2
• by using identity (x-y)^3= x^3-y^3-3xy (x-y)