What is the value of b2 - 4ac for the following equation? x(x + 8) = 9

asked Jan 17, 2018 150k views

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

x(x + 8) = 9

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4 votes

This is the formula for the top of a quadratic equation so it would be 8^2-4(1)(-9)

Once answered Jan 19, 2018

by Once

7.0k points

6 votes

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

Todd answered Jan 22, 2018

by Todd

8.0k points

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