Question

Check whether 5+2x is a factor of 3x²+10x.​

Answer 1

For this:
5+ 2x
X= -5/2 no substitute it in equation 3x sq+ 10x if answer comes 0, it is a factor, otherwise not.
Hope u understood!!

Answer 2

Answer:

Zero of 5+2x

5+2x=0

2x=-5

x=-5/2

Substituting -5/2 in the place of x.

3×(-5/2)^2+10×(-5/2)

3×25/4-50/2

75/4-50/2

After taking LCM

75/4 - 100/4

=(-25/4)

As the ANSWER is not 0, 5+2x is not a factor of 3x^2 +10

HOPE MY ANSWER HELPED YOU.THANK YOU.