Question

What are the x- and y-intercepts of the quadratic equation y = x2 + 2x - 3?

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

well for the y intercept let x = 0... and this will eliminate 2 options

Answer 2

and then for x-intercept plug in y = 0

Answer 3

then factor the quadratic to find the x intercepts...

Answer 4

or... substitute an x value from the 2 choices and see if you get y = 0...

if its true, try the other

Answer 5

as an really cheeky option

use this link to graph it

https://www.desmos.com/calculator

Answer 6

and it's x - intercept (x-intercept,0) so u should let y=0

Answer 7

(x + 3)(x - 1)

Answer 8

x = - 3 and x = 1

Answer 9

So is it B or D

Answer 10

and find y=intercept too

Answer 11

so when x = 0 what is the y value in the equation..?

Answer 12

y = -3 when x = 0

Answer 13

Answer is B

Answer 14

Great! correct ;)

Answer 15

I wish i could give you both medals. thank you!

Answer 16

you're welcome ;)