Question

find the quadratic polynomial whose sum of the zero is -3 and their product is 4​

Answer 1

Answer:

x² + 3x + 4

Step-by-step explanation:

use equation

x²- x(a+b) + ab

keep sum in (a+b) = -3

and product (ab) = 4

therefore

x² - x(-3) + 4

= x² + 3x + 4

(do you know whu we use that eqn?)

because roots are given as (x+2)(x-1) for example

and then if we expand we use that eqn, nothing new...