tylerharper95
tylerharper95
28-04-2015
Mathematics
Answered
solve number 9 using quadratics
Answer :
Panoyin
Panoyin
29-04-2015
5f² - 3f = 8
5f² - 3f - 8 = 0
f =
-(-3) +/- √((-3)² - 4(5)(-8))
2(5)
f =
3 +/- √(9 + 160)
10
f =
3 +/- √(169)
10
f =
3 +/- 13
10
f =
3 + 13
f =
3 - 13
10 10
f =
13
f =
-10
10 10
f = 1.3 f = -1
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