Can someone help me solve this: Decide all values of b in the following equations that will give one or more real number solutions.
(a) 3x^2+bx-3=0
(b) 5x^2+bx+1=0
(c) -3x^2 +bx-3=0
(d) write a rule for judging if an equation has solutions by looking at it in standard form.
is this correct on second post