State the x intercepts and y intercept of each function

Question

y = x^2 + 2x - 8

Answer 1

y intercept is where x=0:

 

  y = 0^2 +2(0) - 8 = 0 + 0 - 8 = -8

 

So (0,-8)

 

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x intercepts are when y=0

 

y = x^2 + 2x - 8  = 0

 

(  x    +   4)( x  -     2   ) = 0

 

x= -4 or x = 2

 

(-4,0) and (2,0)