Please help I need to finish this

1.) x={1,−2}

2.) x={3,-9}

3.) x = {4, 4}

4.) x={0, 12}

5.) x = {6, 8}

Step-by-step explanation:

1.) x2+x-2=0

Step-1 : Multiply the coefficient of the first term by the constant   1 • -2 = -2

Step-2 : Find two factors of  -2  whose sum equals the coefficient of the middle term, which is   1 .

-2 +  1=   -1

     -1+ 2=  1    That's it

Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above,  -1  and  2

             x2 - 1x + 2x - 2

Step-4 : Add up the first 2 terms, pulling out like factors :

                 x • (x-1)

add up the last 2 terms, pulling out common factors :

                   2 • (x-1)

Step-5 : Add up the four terms of step 4 :

                   (x+2)  •  (x-1)

               (x + 2) • (x - 1)  = 0

Hope this Helps

it has to be a.