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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