Question

if(x-2) and (c+3)are factors ofx³+ax²+bx-30, find a and b​

Answer 1

Answer: F(x) = x-2

x = 2

p(2) = 2³ + 4a + 2b - 30

       = 8 + 4a + 2b - 30

       = 4a + 2b - 28.

p(-3) = -27 + 9a - 3b - 30

         = 9a - 3b - 57

4a + 2b - 28 = 9a - 3b - 57

2b - 28 = 5a - 3b - 57

5b - 28 = 5a - 57

5(a-b) = -29

a-b = -5.8

Step-by-step explanation: