miah
Solve. 3x2 – 7x – 2 = 0
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jhonyy9
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do you know how you can solving a quadratic ?
jhonyy9
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us formula of discriminant
jhonyy9
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D = b^2 -4ac
jhonyy9
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so you dont know it how ?
miah
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no
shreya.
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\[3x^{2}-7x-2=0\]
Use the formula that jhonyy9 gave to calculate the Discriminant \[D=b^{2}-4ac\]
now use the quadratic formula
which is \[\frac{ -b \pm \sqrt{D} }{ 2a }\]
where a=3 b=-7 and c=-2
miah
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uhm ?
shreya.
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we use these formula's to solve the quadratic equations - \[ax^{2}+bx+c=0\]
miah
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I have no idea how to do it
shreya.
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\[x=\frac{-b \pm \sqrt{D} }{ 2a }\]
shreya.
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just put the values. first to calculate D and then in the above formula.
miah
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is the answer \[x=\frac{ 7\pm \sqrt{73} }{ 6 }\]
shreya.
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yes :-) ..!!
miah
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yayy