Question 628120
1) At what point on the curve y=x^2+7x-8 is the gradient equal to 1 ? 
y' = 2x + 7
2x + 7 = 1
x = -3
--> (-3,-20)
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2) At which points on the curve y=x^3+3x^2-5 is the gradient equal to 9 ? 
y' = 3x^2 + 6x
3x^2 + 6x - 9 = 0
x^2 + 2x - 3 = 0
x = -3, 1
etc