lali03
lali03
12-01-2017
Mathematics
contestada
I don't not understand this please help!!!!!
Respuesta :
jeniferb
jeniferb
12-01-2017
y= -2x-1
y=x+5.......... x =y-5
sub in the x value in the first equation
y=-2(y-5)-1
y=-2y+10-1
y+2y= 9
3y=9
y=3
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[tex] {x}^{2} + 5x - 9 = 0[/tex]
