Ответ:
5х^2= 9х+2
5x^2-9x-2=0
D= 81+40=121
x1= (9+11)/10 = 2
x2= (9-11)/10 = -0,2
Ответ: x=-0,2
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Ответ:
5х^2= 9х+2
5x^2-9x-2=0
D= 81+40=121
x1= (9+11)/10 = 2
x2= (9-11)/10 = -0,2
Ответ: x=-0,2