anonymous
  • anonymous
Solve: 2x2 – x = 15 Can someone help me on how to solve this?
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.
katieb
  • katieb
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
its 2x^2 by the way
anonymous
  • anonymous
2x^2 – x -15= 0 Now what two numbers times to give -30 and add to give -1?
anonymous
  • anonymous
why -30?

Looking for something else?

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

More answers

anonymous
  • anonymous
because a=2
anonymous
  • anonymous
oh so 2 * -15 = - 30, okay so now the numbers are -6 and 5, rigjt?
anonymous
  • anonymous
Perfect |dw:1326935966655:dw|
anonymous
  • anonymous
these are the choices: a. x = 5/2 and x = 7 b. x = 7 /2 and x = –1 c. x = 3 and x = –5 /2 d. x = 3 and x = 1
anonymous
  • anonymous
So we can write 2x^2 – x -15= 0 as 2x^2 – 6x +5x-15= 0 Now we are going to group like terms (2x^2 – 6x)+( 5x-15)= 0 and factor 2x(x – 3)+5( x-3)= 0 and factor again (x – 3)(2x+5)= 0 okay now we can find out what x is x-3=0 x=3 and 2x+5=0 2x=-5 x=-5/2 So the answer is c.
anonymous
  • anonymous
oh i see thanks!

Looking for something else?

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