Which one of the following polynomial functions would have t

Which one of the following polynomial functions would have the only x intercept at (-1, 0) and a y intercept (0, -5)? p(x) = (x - 1)(x + 5) p(x) = -5x(x + 1) p(x) = -(x - 1)^5 p(x) = -5(x + 1)^3 none of these Find the equation of the axis of symmetry of the parabola. f(x0 = (x + 5)^2 + 5 x = 5 y = 5 x = 0 x = -5 None of the above Solve in the complex number system x^2 = 1. x = 1, -1 x = 1 x = i, -1 x = 1, -1, i, -i Let p = (x, y) be a point on the graph of y = Squareroot x. Express the distance d from p to the point (2, 0) as a function of x. d = Squareroot x^2 - 3x + 4 d = x^2 - 3x + 4 d = Squareroot x^2 + 5x + 4 d = x^2 + 5x + 4

Solution

17) given x²=1

then x²-1=0

since a²-b²=(a+b)(a-b)

x²-1=(x+1)(x-1)=0

that implies x+1=0 or x-1=0

x=-1,1

Therefore x=-1,1