Question

Expanded and simplification of (x + 3)(x - 1) will be equal to

A) x2+ 2x - 3 B) x2 + 3x + 2 C) x2 - 2x + 3 D) x2 + 3x - 2

Answer 1

/* By Algebraic Identity */

$\boxed { \pink { (x+a)(x+b) = x^{2} + (a+b)x+ab }}$

$Here, ( x + 3 )(x - 1 ) \\= (x+3)[x + (-1)] \\= x^{2} + ( 3-1)x + 3 \times (-1) \\= x^{2} + 2x - 3$

Therefore.,

$Option \: \green { (A) } \: is \: correct.$

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