book Maths Puzzle Numerical Ability

I need help with this! Thanks so much!
apply the quadratic formula to find the roots of the given function, and then graph the function.

f(x) = x^2 - 4

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book Other Question

give 2 points on the line with the givin equation, then graph the line.
y=-4x+6

i dont no how 2 do any of this Please help i'm very comfused!
Harold camped out in the desert one evening. In the morning, he jumped into his car to go home. He drove at 30 mph headed for the nearest highway, w