2301945
2301945
18-03-2021
Mathematics
contestada
how to solve 2x²-8x-90=0
Respuesta :
stefaniyax04
stefaniyax04
18-03-2021
а=2
b=-8
c=-90
D=b^2-4ac
D=64+720
D=784=28^2
X1,2=(-b-+D):2a
Х1,2=(8+-28):4
Х1=-5
Х2=9
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