Question

( 13 + x ) ( 13 - x )​

Answer 1

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Answer 2

Answer:

Let us simplify the expression, we get

(13 + x) (13 – x) = (13)2 – (x)2

{We know that (a + b) (a – b) = (a)2 – (b)2}

= 169 + 0(13) – x2

= 169 – x2

∴ (13 + x) (13 – x) = 169 – x2