Question

check whether 7 + 3x is a factor of 3x² + 7x​

Answer 1

Step-by-step explanation:

this is the answer for your question

Answer 2

Step-by-step explanation:

7 + 3x = 0

3x = -7

x = -7/3

Putting x = -7/3

3(-7/3)² + 7(-7/3)

3(49/9) - 49/9

LCM of 9 is 9

So,

3 × 49 - 49/9

3 × 0/9

3 × 0

0

Thus 7 + 3x is factor of 3x² + 7x