Question

The factors of the expression $x^2-2x-63$ are

• A. $x-7,x-9$
• B. $x+7,x+9$
• C. $x+7,x-9$
• D. $x-7,x+9$

Answer 1

Answer: (C)

(i) Factorize the given expression.
(ii) Use the method of factorization of $a{x}^2+bx+c$.
(iii) Express $b$ as $(m+n)$ such that $mn=ac$.