anonymous
  • anonymous
please help with this problem 3x^3+4x^2=27x+36
Algebra
  • 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.
katieb
  • katieb
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
misty1212
  • misty1212
HI!!
misty1212
  • misty1212
you have a cubic equation to solve?
anonymous
  • anonymous
yes can you please explain all the steps for me

Looking for something else?

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

More answers

misty1212
  • misty1212
there is a formula for solving cubes, but it is almost incomprehensible start with \[3x^3+4x^2-27x-36=0\] and then make an educated guess , which is really all you ca ndo
misty1212
  • misty1212
i guess 3, since 1 and -1 do not work shall we try it?
anonymous
  • anonymous
ok
misty1212
  • misty1212
i;ll be damned, it works!
misty1212
  • misty1212
got it in the first try so this is \[(x-3)(\text{ some quadratic})\]which you can find using synthetic division or long division (ugh) or thinking (or cheating)
misty1212
  • misty1212
i can't write synthetic division here, but i can cheat or think you pick
anonymous
  • anonymous
idk
misty1212
  • misty1212
http://www.wolframalpha.com/input/?i=3x%5E3%2B4x%5E2-27x-36%3D0
anonymous
  • anonymous
tnx
JohnN.
  • JohnN.
Let's solve your equation step-by-step. 3x3+4x2=27x+36 Step 1: Subtract 27x+36 from both sides. 3x3+4x2−(27x+36)=27x+36−(27x+36) 3x3+4x2−27x−36=0 Step 2: Factor left side of equation. (x+3)(x−3)(3x+4)=0 Step 3: Set factors equal to 0. x+3=0 or x−3=0 or 3x+4=0 x=−3 or x=3 or x=−43 Answer: x=−3 or x=3 or x=−43

Looking for something else?

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