4 months ago
Q:

What are the exact solutions of x2 = 5x + 2? x = x equals 5 plus or minus the square root of thirty-three all over 2 x = x equals negative 5 plus or minus the square root of thirty-three all over 2 x = x equals 5 plus or minus the square root of seventeen all over 2 x = x equals negative 5 plus or minus the square root of seventeen all over 2

Accepted Solution

A:
x^2 = 5x + 2
x^2 -5x -2 = 0
a = 1
b= -5
c= -2

x = [-b +- sq root (b^2 -4 ac)] / 2a
x = [--5 +- sq root (25 --8)] / 2a
x = [ 5 +- sq root (33)] / 2

Answer is "a"