Question

Find the square of 3a-5b

Answer 1

Answer:

9(a^2)-30ab+25(b^2)

Step-by-step explanation:

Using identity 2

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

3a-5b=(3a)^2-(2×3a×5b)+(5b)^2

=9(a^2)-30ab+25(b^2)

Answer 2

9a-25b

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