Question

Expand:(3a)³+(4b)³
expand:(2x)³-(3y)³​

Answer 1

$\huge\bf\underline{Solution..}$

➟$(3a)³+(4b)³$

➟$(3a) {}^{3} + (4b) {}^{3} + 3 \times 3 {}^{2} \times4 + 3 \times 3 \times 4 {}^{2}$

➟$</strong><strong>27a {}^{3} + 64b {}^{3} + 168 {a}^{2} b + 36a {b}^{2} </strong><strong>$...

➟$(2x)³-(3y)³$

➟$8x {}^{3} - 27y {}^{3} - 3 \times 2x {}^{2} \times 3y + 3 \times 2x \times 3y {}^{2}$

➟$</strong><strong>8x {}^{3} - 27y {}^{3} - 36x {}^{2} y + 54xy {}^{2}</strong><strong>$

Step-by-step explanation:

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