Question

What are the x– and y–intercepts of the quadratic equation y = x2 + 2x – 3?
Answer
a.x–intercepts: (3, 0) and (–1, 0)
y–intercept: (0, –3)
b.x–intercepts: (–3, 0) and (1, 0)
y–intercept: (0, 3)
c.x–intercepts: (–3, 0) and (1, 0)
y–intercept: (0, –3)
d.x–intercepts: (3, 0) and (–1, 0)
y–intercept: (0, 3)

Answer 1

Factor to get y=(x+3)(x-1)
Set y=0 and solve to get
x+3=0 or x-1=0
x=-3 or x=1
These are the x-intercepts

Answer 2

y-int plug in 0 for x
y = -3
x-int plug in 0 for y
0 = x^2 + 2x - 3
factor
0 = (x-1)(x+3)
x-int:
x = 1, -3