the value of k for which the quadratic equation x²-4x+k=0 has equal roots is:
Answers
Answered by
1
Answer:
K = 4
Step-by-step explanation:
by the discriminant formula
D = b^2 -4ac
when the root are equal then D is equal to 0
so , (-4)^2 - 4*1*k = 0
16- 4k = 0
k = 4
Answered by
0
Answer:
4
Step-by-step explanation:
If the equation has equal roots then
√b^2-4ac=0
√(-4)^2-4*1*k=0
√16-4k=0
squaring both sides
16-4k=0
16=4k
k=16/4=4
Similar questions