Question

(2a+b)³ answer this guestion
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Answer 1

Answer:

as, (a+b)³=a³+b³+3a²b+3ab²

.

Thus,

(2a+b)³=(2a)³+(b)³+3(2a)(3)²+3(2a)²(3)

(2a+b)³=8a³+b³+54a+36a²

8a³+b³+54a+36a²

Answer 2

Answer:

Step-by-step explanation:

by applying formula : $[a+b]^{3} = a^{3}+ b^{3}+3ab(a+b)$

$(2a+b)^{3} = (2a)^{^{2}}+ b^{3} +3(2a)b[2a+b]\\ \\ = 6a^{3}+b^{3} +6ab[2a+b]\\\\=6a^{3}+b^{3} +12a^{2} b+12ab^{2}$