which of the ff. coordinates of points belong to the solution set of the inequality y<3x^2+3x-6?

a)(-1,2)
b)(1,-2)
c)(-2,7)
d)(-1,1)

1 answer

just plug in the values and see. For example, take (1,-2). Is

3*1 + 3*1 - 6 < -2 ?
0 < -2 ?
No.

Now try the others.