Question

6. If alfa and Bita are the roots of the quadratic
equation x²- 2x - 7=0, find the value of
alfa²+Bita²​

Answer 1

Answer:

I think that's not of my class

Answer 2

Answer:

-10

Step-by-step explanation:

x²-2x-7=0

Here,a=1 ; b=-2 ; c=-7

α²+β²=(α+β)²-2αβ

α+β=-b/a                                      αβ=c/a

     =-(-2)/1                                        =-7/1

     =2                                              =-7

α²+β²=2² - 2(7)

        =4-14

        =-10