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What is the value of b2 - 4ac for the following equation? x(x + 8) = 9
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Jan 17, 2018
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What is the value of b2 - 4ac for the following equation?
x(x + 8) = 9
Mathematics
middle-school
Derek Gebhard
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Derek Gebhard
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This is the formula for the top of a quadratic equation so it would be 8^2-4(1)(-9)
Once
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Jan 19, 2018
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Once
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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
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Jan 22, 2018
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Todd
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