Question

3. Using suitable identities, find the following products:
(a) (4x + 9y)(4x + 9y)
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Answer 1

Answer:

you can use (a+b)= a^2+b^2-2ab

hope it helps

Answer 2

Answer:

(4x+9)(4x+9)

4x(4x+9)+9(4x+9)

16x²+36x+36x+81

16x²+52x+81