posted by carla on .
I worked the problem out, but could you check my work over and see if it's correct? I used the quadratic formula.
a=2 b=10 c=11
x=-10(plus or minus) sqrt 10^2-4(2)(11)
-10(plus or minus) sqrt 100 - 8(11)
-10(plus or minus) sqrt 100-88
-10(plus or minus) sqrt 12
-10(plus or minus) 2 sqrt 3
can this be simplified any more? or is the final answer even correct? pls help!!
Divide the 2a out, so
x= -2.5 +- .5* sqrt3
I'm a little confused. could you show me where exactly I went wrong? thanks! :)
When you used the formula
x = [-b +/- sqrt (b^2-4ac)]/2a, you forgot to divided by 2a, which is 4.