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

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

x(x + 8) = 9

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User Derek Gebhard
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8.0k points

2 Answers

4 votes
This is the formula for the top of a quadratic equation so it would be 8^2-4(1)(-9)
answered
User Once
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7.5k 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
answered
User Todd
by
8.6k points
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