anonymous
  • anonymous
I'm trying to solve 2x^2+11x-21 by quadratic formula. Factoring gives 3/2, -7, but by the formula (which should always work), I get: (-11/4)+/-((22/4)(42)^(1/2)). Can anyone help me spot my stupid error?
Mathematics
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
lalaly
  • lalaly
are u still there?
anonymous
  • anonymous
factoring gives 3/2, -7, the quadratic formula is x=(-b±sqrt(b^2-4ac))/2a from your equation a=2,b=11,c=-21 put values in formula x=(-11±sqrt(121-(168)))/2x2 x=(-11±sqrt(289))/4 x=(-11±17)/4. x=3/2, -7
jhonyy9
  • jhonyy9
so if factoring this is right (2x-3)(x+7)=2x2+11x-21 so than your got solutions x=3/2 and x=-7 is right,correct sure always

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

jhonyy9
  • jhonyy9
mominanisar ATTENTION in this calcules are some errore because inside squarroot there not is minus 168 correct,right is plus 168 and in thgis way will get these correct factorized resultes
jhonyy9
  • jhonyy9
check it newly please
anonymous
  • anonymous
i am seriously sorry actually this step is likex=(-11±sqrt(121-(168)))/2x2 new onex=(-11±sqrt(121-(-168)))/2x2 because 'c' is minus
anonymous
  • anonymous
it is a typing mistake by me
anonymous
  • anonymous
Thanks!

Looking for something else?

Not the answer you are looking for? Search for more explanations.