Question

for what value of k the root of the quadratic equation K + 4 x square + K + 1 X + 1 is equal to zero are equal​

Answer 1

b²-4ac=0

(k+1)² -4(k+4)(1)=0

k²+1+2k-4k-16=0

k²-2k-15=0

k²-5k+3k-15=0

k(k-5)+3(k-5)=0

(k+3)(k-5)=0

k= -3 , 5

Answer 2

I hope this will help you