Question

Tolong dijawab ya dengan caranya.
terimakasih..


*abaikan coretan warna warni*

Answer 1

x1 = 1/c

x2 = 1/d

c+d = -1

1/x1 + 1/x2 = -1

cd = 2

1/x1.x2 = 2

x1.x2 = 1/2

1/x1 + 1/x2 = -1

(x1+x2)/x1.x2 = -1

(x1+x2).2 = -1

-(a-1)/2 = -1/2

a-1 = 1

a = 2

8a = 16

6+8a = 22