Question

check weather 7+3x is a factor of 3x³+ 7x​

Answer 1

Step-by-step explanation:

7 + 3x is not a factor of p(x) = 3x3 + 7x since, the remainder of p(-7/3) is not equal to 0.

Answer 2

Step-by-step explanation:

$3x + 7 = 0 \\ x = - \frac{7}{3}$

$3 {x}^{3} + 7x \\ = 3 \times (- { \frac{7}{3} })^{3} + 7 \times - \frac{7}{3} \\ = 3 \times - \frac{343}{27} - \frac{1}{3} \\ = - \frac{343}{9} - \frac{1}{3} \\ = \frac{ - 343 - 3}{9} \\ = \frac{ - 346}{9}$

7+3x is not a factor of 3x³+ 7x