choice b is correct answer.
given equation is :
-4x²+10x+6 = 0
ax²+bx+c = 0 is general quadratic equation.
comparing general equation with given quadratic equation,we get
a = -4 ,b = 10 and c = 6
we use the discriminant formula to find number of solution.
if d > 0 then there is two real solutions.
the formula to find discriminant is :
d = b²-4ac
putting above values in discriminant formula, we get
d = (10)²-4(-4)(6)
d = 100+96
d = 196 > 0
hence , equation have two real equation.
the answer is b.