Which part of the quadratic formula tells you whether the quadratic equation can be solved by factoring? −b b2 − 4ac 2a Use the part of the quadratic formula that you chose above and find its value given the following quadratic equation: 2x2 + 7x + 3 = 0

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Which part of the quadratic formula tells you whether the quadratic equation can be solved by factoring? −b b2 − 4ac 2a Use the part of the quadratic formula that you chose above and find its value given the following quadratic equation: 2x2 + 7x + 3 = 0

Mathematics
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The discriminant. b^2-4ac must be >0 for real number factors.
It's [b ^{2}-4ac\] But I don't remember why or how. To solve it it's easy, think of your equation in this way: a is paired with x because x is earlier in the alphabet, so is a b is paired with y because y is after x in the alphabet, as is b to a and c is always your number on it's own.
no idea how to do this its a pretest i just need a numerical answer to the second part

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Don't you have the quadratic formula?
You can also do it by grouping
You just have to plug the numbers from the equation they gave you into the answer you chose for the first part and solve it.
Actualy, grouping is not going to work here. Use the quadratic formula
if i seen it i would understand
The whole quadratic formula isn't needed, just the part of the equation picked in part 1. Take the b^2 - 4ac and put in the values of b, a, and c and compute it using a calculator.
Oh yes, only the discriminant is needed. Skimmed that part.
  • phi
The second part of the question is asking you to find b^2 - 4ac So you need to find a,b, and c, and use the above formula the a, b, and c come from a x^2 + bx + c so match your quadratic 2x^2 + 7x + 3 = 0 to find a,b, and c.

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