Question

find the cube of 3a +4

Answer 1

Answer:

27a³+64+108a²+144a

Step-by-step explanation:

(3a+4)³

=(3a)³+(4)³+3(3a)(4)(3a+4)

=27a³+64+36a(3a+4)

=27a³+64+108a²+144a

Answer 2

27a³+ 64 + 108 a + 144 ab

Step-by-step explanation:

here,

( 3a+4)³ =( 3a)³+4³+3.3a.4 (3a+4)

{since ( x+y) ³ = x³+y³+3 xy( x+ y) }

= 27 a³ + 64 + 108 a + 144 ab