For what value of h makes this equation true? (just checking my work) h - (-3) = 9 a) h = - 27 b) h - 6 c) h = 12 d) h = -3

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)