DeadRight

I usually just punch the number into the calculator to calculate. Maybe that's just me. (7.7 * 10¹⁶)

Which, without using a calculator, would be 77 followed by 15 zeros. "77 000 000 000 000 000"

I'm abit confused. Can you explained what happened after: "The discriminant must be zero if there is to be a single solution, so"

Why -4? 

I would assume that only a straight verticle line can intercept with a parabola.

Look at a parabola. It's grows expotentially on two ends. If there is a maximum, then the growth is "downwards" (negative in the y axis), never ending meaning there is no minimum value.. If there is a minimum, then the growth is "upwards"(positive in the x axis), never ending meaning there is no maximum value.

Imagine the maximum and minimum values as the start of the road. If the road keep on growing without stopping, will there be an end?

31.52 what? We need the unit. Is it 31.52 hour? Second? Minutes? Also, what is time? We need the unit from and to.

If it's 31.52 hours to minute. Then you 31.52 * 60 = 1891.2 Minutes

If it's 31.52 minutes to hour. Then you 31.52 / 60 = 0.5253333.... hour

If your time is 00:00 and you just did 31.52 hours of something. Then the time would be:

(We want a number ranging between 0-24) so we do 31.52 - 24 = 7.52 This tells us that 24 hours has passed (ignore cause it brings us back to 00:00) and another 7 hours has passed and 0.52 hour. Then we find the minute: 0.52 * 60 = 31.2 minutes. So the final answer, the time, is 7:31 AM.

I don't know what you want.

Force = Mass * Acceleration

This equation is missing the time taken. With the time taken s. We can work out the acceleration. Since mass is equal to 1. Force = Acceleration (In this case only)

Acceleration: Speed / time which translate to 1 / s^2

I think :P

The answer is 0. Why?

a2x is the just: a * 2 * x (a multiplied by 2 and x). Thus, you can arrange a2x as '2ax' or 'ax2' and it would still mean the same thing. Looking at the equation "a2x - ax2". You can rearrange the "a2x" to "ax2". What is the "ax2 - ax2"? 

Another thing to keep in mind:

If a = 2, x= 3

Replace those numbers into the equation: a2x - ax2. It check out.

(2*2*3) - (2*3*2)

12 - 12 = 0

If you're still confused, ask.