Question

Write the following cubes in the expanded form:

      (i)   (3a + 4b)3

      (ii)   (5p – 3q)3

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Answer 1

hey❤

here is ur answer!!

(a + b) ^3 = a^3 + b^3 + 3ab(a+b)

Thus,

(3a + 4b) ^3 = 27a^3 + 64b^3 + 36(3a + 4b)

(a-b)^3 = a^3 - b^3 -3ab(a-b)

Thus,

(5p - 3q) ^3 = 125p^3 - 27q^3 - 45pq( 5p - 3q)

hope it helps!!!

thanks☺☺☺

Answer 2

${ (a + b) }^{3} = {a}^{3} + {b}^{3} + 3ab(a + b) \\ {3a}^{3} + {4b}^{3} + 3(3a)(4b)(3a + 4b) \\ {27a}^{3} + {54b}^{2} + 36ab(3a \: + 4b) \\ {(a - b)}^{3} = {a}^{3} - {b}^{3} - 3ab(a + b) \\ {(5p)}^{3} - {(3q)}^{3} - 3 \times 5p \times 3q(5p + 3q) \\ {125p}^{3} - {27}^{3} - 45pq(5p + 3q)$

#hope it help uh.

BRAINLIEST PLS