Question

Find the coefficient of y in (y-1) (y+1)​

Answer 1

Answer:

First solve the question by using the property

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

Step-by-step explanation:

=y^2-1^2

=y^2-1

so the coffiecient of y is 1^2=1

hence'

y=1

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