Question

Selec a suitable identify and find the following products (7d-9e)(7d-9e)

Answer 1

Step-by-step explanation:

(7d-9e)^2

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

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(7d)^2+(9e)^2-2(7d)(9e)

49d^2+81e^w-126de..