SOLUTION: Can someone please help me with this? Thank you! -2X^2 - 5X + 27 = 0 Melissa

Algebra ->  Expressions -> SOLUTION: Can someone please help me with this? Thank you! -2X^2 - 5X + 27 = 0 Melissa      Log On


   

Question 705842: Can someone please help me with this? Thank you!
-2X^2 - 5X + 27 = 0
Melissa
Found 2 solutions by jim_thompson5910, MathLover1:
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Use the quadratic formula to solve for x

x+=+%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F%282a%29

x+=+%28-%28-5%29%2B-sqrt%28%28-5%29%5E2-4%28-2%29%2827%29%29%29%2F%282%28-2%29%29 Plug in a+=+-2, b+=+-5, c+=+27

x+=+%285%2B-sqrt%2825-%28-216%29%29%29%2F%28-4%29

x+=+%285%2B-sqrt%2825%2B216%29%29%2F%28-4%29

x+=+%285%2B-sqrt%28241%29%29%2F%28-4%29

x+=+%285%2Bsqrt%28241%29%29%2F%28-4%29 or x+=+%285-sqrt%28241%29%29%2F%28-4%29

x+=+%28-5-sqrt%28241%29%29%2F%284%29 or x+=+%28-5%2Bsqrt%28241%29%29%2F%284%29

x+=+%28-5%2Bsqrt%28241%29%29%2F%284%29 or x+=+%28-5-sqrt%28241%29%29%2F%284%29

Solutions: x+=+%28-5%2Bsqrt%28241%29%29%2F%284%29 or x+=+%28-5-sqrt%28241%29%29%2F%284%29

--------------------------------------------------------------------------------------------------------------

If you need more help, you can email me at jim_thompson5910@hotmail.com

To find other ways to contact me, you can also visit my website: http://www.freewebs.com/jimthompson5910/home.html

Thanks,

Jim

--------------------------------------------------------------------------------------------------------------

Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
-2x%5E2+-+5x+%2B+27+=+0.use quadratic formula

x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+.....a=-2, b=-5, and c=27

x+=+%28-%28-5%29+%2B-+sqrt%28+%28-5%29%5E2-4%2A%28-2%29%2A27+%29%29%2F%282%2A%28-2%29%29+


x+=+%285+%2B-+sqrt%2825%2B216%29%29%2F-4+

x+=+%285+%2B-+sqrt%28241%29%29%2F-4+

x+=+%285+%2B-+15.5%29%2F-4+

solutions:
x+=+%285+%2B15.5%29%2F-4+
x+=+20.5%2F-4+
x+=+-5.13+
or
x+=+%285+-15.5%29%2F-4+
x+=+-10.5%2F-4+
x+=+2.63+

+graph%28+600%2C+600%2C+-10%2C10%2C+-10%2C+35%2C+-2x%5E2+-+5x+%2B+27%29+