If x -3 is a factor of x2-ax-15, then a =

Let, f(x) = x2 - ax - 15Since, (x -3) is a factor of f (x), sof (3) = 032 - a (3) -15 = 09 - 3a - 15 = 0a = -2

Q12 of 96 Page 6

If x -3 is a factor of x²-ax-15, then a =

Let, f(x) = x² - ax - 15

Since, (x -3) is a factor of f (x), so

f (3) = 0

3² - a (3) -15 = 0

9 - 3a - 15 = 0

a = -2

(x+1) is a factor of xⁿ+1 only if

If x+2 is a factor of x²+mx+14, then m =

If x²+x+1 is a factor of the polynomial 3x²+8x²+8x+3+5k, then the value of k is

If (3x-1)⁷ =a₇x⁷+a₆x⁶+a₅x⁵+….a₁x+a₀, then a₇+a₆+a₅+….+a₁+a₀=