Question

If x+2 is a factor of x-2ax” +16, then
value of a is​

Answer 1

Answer:

Explanation:

use factor theorem as x+2 is factor of

x³-2ax²+16 so put x = -2 and equate the equation to 0

so putting x = -2

(-2)³-2a(-2)²+16 =0

-8-8a+16=0

-8a = -8

a = 8/8= 1

So,

a = 1