Question

the
Factorise the following by splitting
middle termi
3x²+21x+30​

Answer 1

Answer:

(3x+6) (x+5)

Step-by-step explanation:

3x square +21x +30

3x square +15x +6x+30

3x(x+5)+6(x+5)

(3x+6)(x+5)

hope this helps

pls rate

Answer 2

Answer:

Step-by-step explanation:

$3x^2+15x+6x+30\\\\3x(x+5)+6(x+5)=0\\\\(3x+6)(x+5)=0\\\\3x=-6 \;\; and \;\; x+5=0\\\\x=\frac{-6}{3}=2 \;\; and \;\; x=-5$