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If a=2,b= -11 , c = 15 , find the value ...

If a=2,b= -11 , c = 15 , find the value of `b^(2)- 4ac`.

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`b^(2) - 4ac = ( - 11)^(2) - 4(2) (15) = 121 - 120 = 1 `
The value of `b^(2) - 4ac ` is 1.
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