Which of these polynomial equations is of least degree and has -1, 2, and 4 as three of its roots?

5x^2 + 2x + 8 = 0
(x + 2)(x - 1)(x + 4) = 0
x^3 - 5x^2 + 2x + 8 = 0
x^4 - x^3 - 5x^2 + 2x + 8 = 0

Question

Which of these polynomial equations is of least degree and has -1, 2, and 4 as three of its roots?

5x^2 + 2x + 8 = 0
(x + 2)(x - 1)(x + 4) = 0
x^3 - 5x^2 + 2x + 8 = 0
x^4 - x^3 - 5x^2 + 2x + 8 = 0

janu16 · Answer

ok number 1 doesnt have those roots hwne you solve it
number 2 has the roots but its -2 so cant be number 2
only number 3 has those roots when you solve it

janu16 · Answer

@dirtydan667