for what value of k the quadratic equation has real roots kx2-8x+k=0
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kx^2–8x+k=0
D = b^2 -4a.c =0
(-8)^2 - 4×k×k=0
64 -4k^2 =0
- 4k^2 = -64
k^2 =64/4 =16
k = +/-4
D = b^2 -4a.c =0
(-8)^2 - 4×k×k=0
64 -4k^2 =0
- 4k^2 = -64
k^2 =64/4 =16
k = +/-4
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