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

anonymous · Answer

I really need help on this please!

anonymous · Answer

$$2x ^{2}+7x+3=0?$$

anonymous · Answer

so a=2 b=7 and c=3.   does -b tell you if you can factor or not?  what about the other components?

anonymous · Answer

basically the only rule that tells whether u can factor a quadratic into its roots is the discriminant
$$\sqrt{b ^{2}-4ac}$$

anonymous · Answer

is the result is a perfect square, then you can complete the problem by factoring.

anonymous · Answer

if the discriminant is negative, then the roots are complex
hope this helps.

anonymous · Answer

$$\sqrt{7^{2}-4(2)(3)}=\sqrt{49-24}=\sqrt{25}=5$$

anonymous · Answer

(2x +1)(x+ 3)=0 then solve for x  
$$x =-\frac{ 1 }{ 2 }$$ or $$x = -3$$