M marshall1432 Banned Joined Jan 10, 2007 Messages 80 Jan 23, 2008 #1 Solve by using the quadratic formula : 3x'2squared' - 5x-7=0 WORK DONE : A= 3, B= 5 C=7 x=5+- (-5)2-4(3)(7) ---------- 2(3) x=5+- }25-84 ------ 6 x=5+- 59 --- 6 x=5+-]-59 ---- 6 thats what i got as my answer.

Solve by using the quadratic formula : 3x'2squared' - 5x-7=0 WORK DONE : A= 3, B= 5 C=7 x=5+- (-5)2-4(3)(7) ---------- 2(3) x=5+- }25-84 ------ 6 x=5+- 59 --- 6 x=5+-]-59 ---- 6 thats what i got as my answer.

S Subhotosh Khan Super Moderator Staff member Joined Jun 18, 2007 Messages 18,134 Jan 23, 2008 #2 Re: Solve by using the quadratic formula : marshall1432 said: Solve by using the quadratic formula : 3x'2squared' - 5x-7=0 WORK DONE : A= 3, B= -5 C= -7 <--- Watch those signs!!! x=5+- (-5)2-4(3)( -7) ---------- 2(3) x=5+- }25 + 84 <-- watch those signs and fix accordingly ------ 6 x=5+- 59 --- 6 x=5+-]-59 ---- 6 thats what i got as my answer. Click to expand...

Re: Solve by using the quadratic formula : marshall1432 said: Solve by using the quadratic formula : 3x'2squared' - 5x-7=0 WORK DONE : A= 3, B= -5 C= -7 <--- Watch those signs!!! x=5+- (-5)2-4(3)( -7) ---------- 2(3) x=5+- }25 + 84 <-- watch those signs and fix accordingly ------ 6 x=5+- 59 --- 6 x=5+-]-59 ---- 6 thats what i got as my answer. Click to expand...