Question

using factor theorem factorise: x³ + x²-17x+15​

Answer 1

Answer:

(x-3).

Step-by-step explanation:

x³+x²-17x+15 = 0.

If f(3) = 27+9-17(3)+15 = 0.

f(3) = 36 - 51 + 15 = 0.

f(3) = -15+15= 0.

0=0.

Therefore, f(3) = 0.

(x-3) is a factor of f(x) =  x³ + x²-17x+15​

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