What is two ways to rewrite 21x^2 -42x +14 in equvalent form? i really need help here lol-

What are the possible rational zeros of [tex]f(x) = x^4+2x^3-3x^2-4x+18[/tex]

1. a right triangle is graphed on a coordinate plane. find the length of the hypotenuse. round your answer to the nearest tenth. 2. use the angle relationship in the figure below to solve for the value of x. assume that lines a and b are parallel and line c is a transversal.

What value of x will make the triangles similar by the sss similarity theorem?