cearramarrieor6mo8 cearramarrieor6mo8
  • 15-06-2017
  • Mathematics
contestada

What is the value of b2 - 4ac for the following equation?

x(x + 8) = 9

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katyp02 katyp02
  • 15-06-2017
This is the formula for the top of a quadratic equation so it would be 8^2-4(1)(-9)
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hanima
hanima hanima
  • 15-06-2017
x²+8x=9
x²+8x-9=0

b²-4ac
a=1 b=8. c=-9

8²-4(1)(-9)
64-36
28

sorry if I'm wrong m8
Answer Link

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