Question

(11x+14) (11x-14)
$(11x + 14) (11x - 14)$
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Answer 1

Why question is repeated twice ?
A square - b square is the formula
Apply and get the answer

Answer 2

We will use the identity of . (a+b)(a-b)=a^2-b^2
so,
(11x)^2-(14)^2
121x^2 -189