Answer :

(p + 8)(p – 3)= p^{2} + [(8)+(- 3)] p + [(8)×(- 3)]

{ ∵(x + a)(x + b)= x^{2} +(a + b)x +(a × b)}

= p^{2} +(8 – 3)p +(- 24)

=p^{2} + 8p – 3p – 24

= p^{2} + 5p – 24

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