Q. 45.0( 3 Votes )

Factorization of x2 + 2x – 8 is
A. (x + 4)(x – 2)

B. (x – 4)(x + 2)

C. (x + 4)(x + 2)

D. (x – 4)(x – 2)

Answer :

Suppose (x + p)(x + q) are two factors of x2 + 2x – 8.


Then, x2 + 2x – 8 = (x + p)(x + q)


= x2 + (p + q)x + pq


So, to factorize we have to find p and q, such that pq = – 8 and p + q = 2.



x2 + 2x – 8 = (x + 4)(x – 2)

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