Corrine24
Corrine24
12-03-2015
Mathematics
Answered
What does k^2 -8k-20=0
Answer :
dln
dln
12-03-2015
[tex]k^{2}-8k-20=0 \\ (k-10)(k+2)=0 \\ \\ k-10=0 \\ k=10 \\ \\ k+2=0 \\ k=-2 \\ \\ \boxed{k=-2\ and\ 10}[/tex]
Answer Link
Panoyin
Panoyin
12-03-2015
k² - 8k - 20 = 0
k =
-(-8) +/- √((-8)² - 4(1)(-20))
2(1)
k =
8 +/- √(64 + 80)
2
k =
8 +/- √(144)
2
k =
8 +/- 12
2
k =
8 + 12
k =
8 - 12
2 2
h =
20
k =
-4
2 2
x = 10 k = -2
Answer Link
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