mandoux
26.08.2019 •
Mathematics
How many and what type of solutions does the equation have?
5y^2=18y−4
a) two rational solutions
b)two nonreal solutions
c)two irrational solutions
d)one rational solution
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Ответ:
5y²=18y−4
5y²-18y+4 = 0
delta = (-18)²-4(5)(4) = 244
(delta) > 0
( c)two irrational solutions because 244 is not a perfect number
Ответ:
Opp^2+adj^2 = hyp^2
h^2 + 4^2=(2√10)^2
h^2 + 16 = 40
h^2 = 24
h = 2√6