Multiply 8-2x/5* 45x^3+90^2/10x^2-20x-80

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?

Given that abcd is a rhombus, what is the value of x?

Which value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12