Question

Check whether x+3 is a factor of x^3 + 3x^2 + 5x +15?

Answer 1

Answer:

x + 3 = 0

x = - 3

${x}^{3} + 3 {x}^{2} + 5x + 15 \\ \\ ( { - 3})^{3} + 3( { - 3})^{2} + 5( - 3) + 15 \\ \\ - 27 + 27 - 15 + 15 \\ \\ 0 - 0 \\ \\ 0$

Hope it helps to you!!

Answer 2

Answer:

yes it is correct

Step-by-step explanation:

because when it is divided it get a quiotent as

x^2+5 when this x+3 divided by x^3+3x^2+5x+15 ok .