exam Maths Puzzle Numerical Ability

(4x2+6)^2

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exam Other Question

I need to solve for all real roots

(x-4)^2=36

and

2(sqrt)(x+4)=3 Velocity. If a ball is dropped from a height of 256ft. then the formula v(t)=
-32t expresses its velocity in feet per second as a function of time in "t" seconds.
a) Find the v(0), the velocity of the ball at time t=0
b) Find v(4)