Need help plz, show work too

Factor the monomial completely 42a3b3

When the solutions to each of the two equations below are graphed in the xy-coordinate plane, the graphs of the solutions intersect at two places. write the y-cordninates of the points of intersection in the boxes below in order from smallest to largest. y=2x y=x^2-3

Write the expression 7x^3-28xy^2 as the product of 3 factors