t^2-13.125t
I need the quadratic expression please help

Question

anonymous · Answer

i'm realy confused as to what to do from here

anonymous · Answer

the equation u gave is  a quadratic expression. what should we do with it/.
should we find roots of it or wat?

anonymous · Answer

i'm trying to find the amnt of time a jet of water is in the air 
here is the full equation
0=-16t^2+210t+0

anonymous · Answer

Do u know how to solve to a quadratic equation?

anonymous · Answer

not this particular one :(

anonymous · Answer

Can u solve x^2-5x+6 =0 ?

anonymous · Answer

no

anonymous · Answer

I got this far
x^2=5x-6

anonymous · Answer

but i think that's wrong

anonymous · Answer

for  a quadratic equation 
$$ax^2+bx+c =0$$
roots or factoors are $$\frac{ -b \pm \sqrt{b^2-4ac} }{ 2a }$$

anonymous · Answer

i gave you that eqution x^2 -5x+6 =0 to know whether u can solve quadratic equations or not!
dont worry!

anonymous · Answer

ok
thank you for all ur help I suck at math

anonymous · Answer

solve for $$16t^2-210t+0=0$$
solve for t from the formula that ive given, you will get t values 0 and some other value,
that value of t which is not zero is your requird answer!

anonymous · Answer

ok

anonymous · Answer

still confused

anonymous · Answer

brb

anonymous · Answer

t = 0 and t = 13s
so 13seconds is the answer