How many presidents would there be if you multiply them by 65
so the number you're looking for is .
discriminant is 36.
x²-4x-5 = 0 have two real solutions.
given equation is :
we have to find discriminant of above equation.
general quadratic equation is :
ax²+bx+c = 0
comparing general equation with quadratic equation,we get
a = 1 ,b= -4 and c = -5
the formula to find discriminant is :
d = b²-4ac
putting the values of a,b and c in formula to find discriminant,we get
d = (-4)²-4()
d = 16+20
d = 36 > 0
if an equation has discriminant real and perfect square ,there are exactly two real solutions.
hence, 36 is real and greater than zero,so give equation have two real solution.
hope this !
when the ball hits the ground then height is 0
so we replace h with 0 and solve for t
a= -16 , b= 60 and c= 5
apply quadratic formula to solve for t
now make two fractions and solve for x
so answer is 3.8 seconds