Question

Solve the quadratic equation by completing the square.

3x2 + x - 5 = 0

Answer 1

you meant this, \[3x^2 + x - 5 = 0\]

(Not a perfect example to complete the square)

Answer 2

yes and i know its hard

Answer 3

Well, it would be easier if you multiply everything times 3, this way _x^2 will be a perfect square at least.

Answer 4

do you know the answer?

Answer 5

\[3x^2 + x - 5 = 0~~~~~~~~~~~~~\times~3\]\[9x^2 + 3x - 15 = 0\]\[9x^2 + 3x = 15\]\[(3x+1/2)(3x+1/2 )=15\]now you do it.

Answer 6

finish it please im writing a paper to

Answer 7

\[(3x+1/2)=\sqrt{15}\]\[3(x+1/6)=\sqrt{15}\]\[x+1/6=+-\sqrt{15}/3\]\[x=-1/6+-\sqrt{15}/3\]\[x=-1/6+-2\sqrt{15}/6\]\[x=(~-1+-2\sqrt{15}~)~/~6\]