Question

( ab - c ) ( ab + c ) .
write down the following products .​

Answer 1

(ab-c)(ab+c)=ab^2-c^2
because (x+y)(x-y)=x^2-y^2

Answer 2

Answer:

{(ab)^2+abc}-{abc-c^2}

(ab)^2 - c^2

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