What is the area of the shaded region

Factor the polynomial 4x4 – 20x2 – 3x2 + 15 by grouping. what is the resulting expression? (4x2 + 3)(x2 – 5) (4x2 – 3)(x2 – 5) (4x2 – 5)(x2 + 3) (4x2 + 5)(x2 – 3)

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c