Subtract 9x^4-x^2 y^2-5y^4 from 3x^4+2x^2 y^2-7y^4

Which of the binomials below is a factor of this trinominal? x^2-13+30

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?

1.two more than the quotient of a number and 6 is equal to 7 use the c for the unknown number translate the sentence into an equation