Question 41863
h(x)=x2(2 means squared)-1
(a) h(2)= (2)^2-1
        = 4-1
        = 3
(b)h(-2)= (-2)^2-1
        = 4-1
        = 3
(c) h(t) = 15
    x^2 -1 = 15
    x^2 = 1+15
        = 16
      x = sqrt(16)
        = + 4 @ -4
(d) h(7.32)= (7.32)^2-1
           = 53.5824 - 1
           = 52.5824