Question

What are the roots of the equation 2x^2 + 7x + 4 = 0

Answer 1

do you have any methods which you know you can use?

Answer 2

do you know how to factor? Have you learned the quadratic equation?

Answer 3

yes I got \[7\pm \sqrt{17} /4\] but I got it wrong

Answer 4

what did you use?

Answer 5

quadratic?

Answer 6

quadratic equation

Answer 7

\[x=\frac{ -b \pm \sqrt{b^2-4ac} }{ 2a }\]

Answer 8

\[x=\frac{ -7 \pm \sqrt{49-4 \cdot 2 \cdot 4} }{ 2 \cdot 2 }=\frac{ -7 \pm \sqrt{49-32} }{ 4 }=\frac{ -7 \pm \sqrt{17} }{ 4 }\]

Answer 9

oh I see I didnt put the negative sign thank you!

Answer 10

you're welcome!