Question

1.Stiind ca a+b=4 si a×b=2 calculati a la 2 + bla a doua

2.Stiind ca x-1 supra x = 2 calculati x la a 2 + 1 supra x la a 2

Answer 1

 1) Daca   a + b = 4,  este imposibil  ca  a x b = 2

 2) (x - 1)/x = 2
x - 1 = 2x
x = -1
x² + (1/2)² = 1 + 1/1 = 2

Verifica daca primul punct e scris corect.