Problema Solution
if z=-2, what is the value of the square z divided by the sum of twice z and 3
Answer provided by our tutors
z = -2
square z = (-2)^2 = 4
twice z and 3 is 2*(z+3) = 2*(-2+3) = 2*1 = 2
thus we can write
z^2 / (2*(z+3) = (-2)^2 / 2*(-2+3) = - 4 / 2 = -2