Which of the following is NOT a perfect square trinomial? Group of answer choices

^2+20−100
4^2−20+25
^2+18+81
16^2−24+9^2

Click on the y intercept. -x +4 i know you cant click on it so could you just say the coordinates like (example - (1,0) you so much.

Ihave trouble finding the nth term of a linear sequence

Write a polynomial function f of least degree that has rational coefficients, a leading coefficient of 1, and the given zeros. 3, 4+2i, 1+(sqrt)7 the answer is supposed to be: f(x)=x(^5)-13x(^4)+60x(^3)-82x(^2)-144x+360 what am i doing wrong?