Question 438128
Replace each y by 0, and solve for the corresponding x-values.

{{{0 = x^2 - 1}}} ==> {{{x^2 = 1}}}==> x-intercepts are -1, 1

The discriminant 4-4*1*35 = 4 - 140 = -136 < 0  ==> there are no x-intercepts for the second function.

For the third, (x - 1)(x - 2) = 0 ==> x-intercepts are 1,2