Question

Find the product using identities:
( x− 3y)²

Answer 1

( x - 3y)^2

Using identity ( a - b)^2 = (a)^2 + (b)^2 - 2ab

➡ (x)^2 + (3y)^2 - 2(x)(3y)
➡ x^2 + 9y^2 - 6xy

Answer 2

Hey mate!
Here's the solution....
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${(x - 3y)}^{2} \\ = {x}^{2} + {(3y)}^{2} - 2 \times x \times 3y \\ = {x}^{2} + {9y}^{2} - 6xy$
I hope it helps you....