write the following cube in the expanded form
a) (3a+4b)³
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Answers
Answered by
1
Answer:
(3a + 4b)³
Using (x + y)³ = x³ + y² + 3xy(x + y)
Where x = 3a & y = 4b
= (3a)³ + (4b)³ + 3(3a)(4b)(3a + 4b) =
= 27a3 + 64b3 + 3(3a)(4b)(3a) + 3(3a)(4b) (4b)
= = 27a³ + 64b³ + 108a²b + 144ab²
Answered by
1
Answer:
27a³+108a²b+144ab²+64b³
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Step-by-step explanation:
(3a+4b)³=27a³+64b³+3(3a)(4b){3a+4b}
=27a³+36ab(3a+4b) +64b³
=27a³+108a²b+144ab²+64b³
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