Which function has real zeros at x = 3 and x = 7?
Of(x) = x2 + 4x - 21
O f(x) = x2 - 4x - 21
Of(x) = x2 - 10x + 21
O f(x) = x2 - 10x – 21

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)

This is about circle theorems. someone asap : (

Which of the following equations are equivalent to -2m - 5m - 8 = 3 + (-7) + m? -15m = -4m -7m - 8 = m - 4 -3m - 8 = 4 - m m - 4 = -7m - 8 -8 - 7m = -4 + m -8 - 3m = 4 - m