Question

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Answer 1

Step-by-step explanation:

RHS is of the form

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

So (6 + px) ( 6-px) =36 - (px)^2

Given

36 - 4p^2 = (6 + px) ( 6-px)

So

36 - 4p^2 = 36 - (px)^2

4p^2 = x^2.p^2

4 = x^2

x = +2 or - 2