Question

Find the discriminant for each equation. Describe the roots.
Give D, then the number of rational, irrational or complex roots. ( ex: 36, 2 rational)

-3x2 -5x =-2.......I know how to do this but i am just not sure how to make it equal 0

Answer 1

discriminate is \[b^2 - 4ac\] if you get a negative number, you'll get complex roots, if its a positive number they will not be complex roots

Answer 2

\[-3x^2 - 5x + 2 = 0\] then use what i gave you above :)

Answer 3

yeaa the 2nd part is what im asking :) if its like the number behind the = then it goes behind the other number??

Answer 4

you just move all the terms to the left hand side so the right side is 0 and then combine any like terms that you may have, in this case there are no like terms to combine so you're good to go on and find the discriminant

Answer 5

and you rearrange the terms if necissary so they are in the form \[ax^2 + bx + c = 0\]

Answer 6

sweet thanks :)

Answer 7

no problem!