Question

O rezolvare la exercitiul 3 va rog​

Answer 1

Ridici toata ecuatia la puterea a 2

[V(x+8-6Vx-1)]² = 1²

x+8-6V(x-1) = 1

-6V(x-1) = 1-x-8

-6V(x-1) = -7-x ridici din nou la puterea a 2

(-6)²(Vx-1)² = (-7-x)²

36(x-1) = 49+14x+x²

36x-36 = 49+14x+x²

36x-36-49-14x-x²=0

22x-85-x²=0  /*(-1)

x²-22x+85 = 0

x²-5x-17x+85=  0

x(x-5)-17(x-5) =0

(x-5)(x-17)=0

x-5= 0 => x1 = 5

x-17 = 0 => x2 = 17