Braya11
Braya11
20-10-2016
Mathematics
contestada
whats the answer for 2y*+2=9y
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Diana5674
Diana5674
22-10-2016
2 = 9y - 2y
2 = 7y
2/7 = y
y = 2/7
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Аноним
Аноним
22-10-2016
i hope this helps you
2y^2+2=9y
2y^2-9y+2=0
ax^2+bx+c=0
disctirminant =b^2-4ac
disctirminant =(-9)^2-4.2.2
disctirminant =81-16
disctirminant =65
x,x'=-b+(-)square root of disctirminant /2a
x=9+square root of 65/4
x'=9-square root of 65/4
.
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