sofiafranco0110
sofiafranco0110 sofiafranco0110
  • 01-04-2020
  • Mathematics
contestada

What are the zeros of 2x^2+17x=-21

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nktselepov
nktselepov nktselepov
  • 01-04-2020

[tex]2x^2+17x+21=0\\D=17^2-4*2*21=121=11^2\\x_1=\frac{-17+11}{4} =-1,5\\x_2=\frac{-17-11}{4} =-7[/tex]

zeros of 2x^2+17x=-21 are (-7;0) and (-1,5)

P.S. Hello from Russia

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