Question

Expand (x-3y)^2, polynomials 9 grade

Answer 1

(x-3y)²

= x²-6xy+9y²

Identity = [(a-b)²= a²-2ab+b²]

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Answer 2

Answer:

${(a - b)}^{2} = {a}^{2} + {b}^{2} - 2ab \\ {(x - 3y)}^{2} = {x}^{2} + {9y}^{2} + 2(x)( - 3y) \\ {x}^{2} + 9 {y}^{2} - 6xy$

Step-by-step explanation:

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