SOLUTION: Can you please help me to solve this equation (x+10)(2x-3)=54? I dont know how to solve it using quadratic equations. Thank you very much!!!

Question 197851: Can you please help me to solve this equation (x+10)(2x-3)=54? I dont know how to solve it using quadratic equations. Thank you very much!!!
Found 3 solutions by checkley77, Mathtut, stanbon:
Answer by checkley77(12844)   (Show Source): You can put this solution on YOUR website!
(x+10)(2x-3)=54
2x^2+20x-3x-30=54
2x^2+17x-30-54=0
2x^2+17x-84=0
(2x-7)(x+12)=0
2x-7=0
2x=7
x=7/2
x=3.5 ans.
x+12=0
x=-12 ans.

Answer by Mathtut(3670)   (Show Source): You can put this solution on YOUR website!

:
multiplied terms
:
gathered like terms into quadratic form
:
factored
:
x=7/2 and x=-12
Answer by stanbon(75887)   (Show Source): You can put this solution on YOUR website!
solve this equation (x+10)(2x-3)=54
---------
2x^2 -3x+20x -30 = 54
2x^2 + 17x -74 = 0
x = [-17 +-sqrt(17^2-4*2*-74)]/4
x = [-17 +- 31]/4
x = 7/2 or x = -12
=============================
Cheers,
Stan H.
RELATED QUESTIONS
I need help solving this quadratic equation and leaving it in radical form I don't know... (answered by mananth)
I have to solve this without using the quadratic equation and really just dont know how... (answered by jim_thompson5910)
Hello, I am having problems understanding the steps used to solve equations using the... (answered by jim_thompson5910,ankor@dixie-net.com)
please help with this. I dont understand how to use the formula. Use the quadratic... (answered by prabhjyot)
Please help me with this problem and please show me how to solve it. Thank you Solve... (answered by nerdybill)
I tried doing the first part of this problem, but not sure if it is right. I dont know... (answered by stanbon)
can you help me solve this problem please! I dont know how to do it! It's.... (4x2)2... (answered by nerdybill,Theo)
Can you please help me solve this? Factorise the quadratic expressions using the... (answered by rothauserc)
i am supposed to solve this equation y=2n^2+2n-24 using the quadratic formula and i dont... (answered by lwsshak3,josmiceli)