Question

For what value of a if ,x-3 is a factor of x³ + x² -17x​

Answer 1

Answer:

${x}^{3} + {x}^{2} - 17x \\ x = 3 \\ {(3)}^{3} + {(3)}^{2} - 17(3) \\ 27 + 9 - 51 = - 15$