Question

3. The roots of the equation x2 + kx +
16 = 0 are equal, then the value of k is
a) 8
Ob) -8
O c) 4
d) both (a) and (b)​

Answer 1

D) both a and b . Hope it helps you pls mark as the BRAINLIEST ANSWER.

Answer 2

$\huge\green {\underline {\mathfrak {Answer:}}}$

$\underline {\bold{\pink{Given:}}}$

➣$p(x) = x^2 + kx + 16 = p$

➣$Roots \ are \ equal$

$\underline {\bold {\pink{Solution:}}}$

✦$\orange{\mathcal{Taking \ discriminant \ 0}}$

➫$D = 0$

➫$b^2 - 4ac = 0$

➫$(k)^2 - 4(1)(16) = 0$

➫$k^2 - 64 = 0$

➫$k^2 = 64$

➫$k = \sqrt{64}$

➫$k = \pm 8$

$\bold{\color{red}{\boxed{\implies{\boxed{\blue{Both \ (a) \ and \ (b)}}}}}}$