Homies need help Expressed in simplest a + bi form, (7 - 3i) + (x - 2i)^2 - (4i + 2x^2) is
A) (3 - x^2) - (4x + 7)i
B) (3 + 3^2) - (4x + 7)i
C) (3 - x^2) - 7i
D) (3 + 3^2) - 7i

When you arrive at the lake, your friend realises he hasn’t got any swimming trunks. you need to ride to a sports shop. the sports shop is 8350 metres away. how many metres is it to cycle there and back?

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)

Math i have no idea how to do a and b