Question

3. Find the value of a, if (x + a) is a factor of x3 + ax2 - 2x + a + 4

Answer 1

Answer:

if x+a is a factor of x3+ax2-2x+a+4

then x=-a

so putting the value x = -a in the equation

p(-a) = -a3+a(-a) 2-2(-a) +a+4

=-a3+a3+2a+a+4

=3a+4

a=-4/3

hope it helps you

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