Question

write the fallowing cube in expanded form
(2a-3b)^2​

Answer 1

Hope it will help you.....

Answer 2

/* It must be like this */

$(2a-3b)^{3} \\= (2a)^{3} -3\times (2a)^{2}\times 3b + 3\times (2a) \times (3b)^{2} - (3b)^{3} \\= 8a^{3} - 36a^{2}b + 54ab^{2} - 27b^{3}$

$\boxed {\pink { Since, (x-y)^{3} = x^{3} - 3x^{2}y + 3xy^{2} - y^{3} }}$

Therefore.,

$\red{ (2a-3b)^{3}}\\\green {= 8a^{3} - 36a^{2}b + 54ab^{2} - 27b^{3}}$

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