Question

Solve. 3x2 - 7x - 2 = 0

is the answer -7 _+_ sq root 25 over 6?

Answer 1

the discriminant should be

d = b^2 - 4ac

d = (-7)^2 - 4(3)(-2)

d = 49 + 24

d = 73

Answer 2

how would it be a positive? slightly confused

Answer 3

(-7)^2 = 49

- 4(3)(-2) = -12*(-2) = 24

Answer 4

so

d = (-7)^2 - 4(3)(-2)

turns into

d = 49 + 24

Answer 5

oh, I see now, thank you @jim_thompson5910

Answer 6

np, so this means that your final answers should be

\[\Large \frac{7\pm\sqrt{73}}{6}\]

Answer 7

Correct, thank you!

Answer 8

Solve. 3x2 - 2x - 3 = 0

Answer 9

x = sq root 80 over 3?

Answer 10

no

Answer 11

let me revise... i made an error obviously

Answer 12

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


\[\Large x = \frac{-(-2)\pm\sqrt{(-2)^2-4(3)(-3)}}{2(3)}\]


\[\Large x = \frac{2\pm\sqrt{4-(-36)}}{6}\]


\[\Large x = \frac{2\pm\sqrt{4+36}}{6}\]


\[\Large x = \frac{2\pm\sqrt{40}}{6}\]


I'll let you finish

Answer 13

keep in mind that \[\Large \sqrt{40}\] can be simplified

Answer 14

I GOT IT!!!!!!!!