Question

15.Expand (2x+3y)?
find the answer​

Answer 1

$\huge{\mathfrak{\underline{\red{Answer!}}}}$

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given (2x - 3y)³

by using identity (a - b)³ = a³ - b³ - 3a²b + 3ab²

here a = 2x and b = 3y

= (2x)³ - (3y)³ - 3(2x)²(3y) + 3(2x)(3y)²

= 8x³ - 27y³ - 36x²y + 54xy²

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