35/20 in simplest form

Multiply −2x(6x^4−7x^2+x−5) express the answer in standard form. enter your answer in the box.

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?

Why is studying fractions important