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

Question

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

accessdenied · Answer

When your equation is factorable, do you usually pull out irrational numbers / square roots?  I think that might be a good hint...

amistre64 · Answer

the fundamental thrm of algebra ...

amistre64 · Answer

the discriminant itself is usefull in determing the number and kind of roots

amistre64 · Answer

2a = 4
-b  = -7

amistre64 · Answer

if we put all the parts together ...$$x=\frac{-b}{2a}\pm\frac{\sqrt{b^2-4ac}}{2a}$$