Question

Factorise $2x^2+13x+15$

• A. ( x - 5) ( 2x - 3)
• B. (x+ 5) (2x + 3)
• C. (x+ 5) (2x - 3)
• D. (x- 5) (2x + 3)

Answer 1

The correct option is B

(x+ 5) (2x + 3)

$2x^2+13x+15$
= $2x^2+10x+3x+15$ ( Since 15 x 2 = 30 and (3 ) + (10) = 13 and (3 x 10 ) = 30 )
= ($2x(x+5)+3(x+5)$

= (x+ 5) (2x + 3)