Q. 2 B5.0( 1 Vote )

Find the expansio

Answer :

(p + 2)(p – 4)(p + 6)


Here the identity used is


(x + a)(x + b)(x + c) = x3 + (a + b + c)x2 + (ab + bc + ca)x + abc


(p + 2)(p – 4)(p + 6)


= p3 + (2 – 4 + 6) p2 + (2(– 4) + (– 4)6 + 6(2))p + (2)(– 4)(6)


= p3 + 4p2 + (– 8 – 24 + 12)p – 48


= p3 + 4p2 – 20p – 48


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