6. (a) By dividing through the equation x4 – 10x3 + 32x2 – 40x + 16 = 0 byx? otherwise, solve the equation completely.
(b) Solve the equation x4 + x3 – 4x2-x + 1 = 0.
(c) Solve the following equation by dividing through by 4x2.
or

Monica build a remote control toy airplane for science project to test the plane she launched it from the top of a building the plane travel a horizontal distance of 50 feet before landing on the ground a quadratic function which models the height of the plane in feet relative to the ground at a horizontal distance of x feet from the building is shown

Tell whether the two rates form a proportion

An ant travels at a constant rate of 30cm every 2 minutes.at what speed does the ant travel per minute