Question

what are the approximate solutions of 2x^2-x+10=0

a) -2,2.5
b)-1.97,2.47
c)-2.5,2
d)no solution

Answer 1

A quick mental check shows the b^2 - 4ac will definitely be negative,
so there is no reason to solve this for real numbers

I did 1 - 4(2)(10), which is clearly negative without actually working it out

no solution.