Răspuns:
I. 1. (5-4i)² + (5+4i)² = 25-40i + 16i² +25+40i+16i²= 50-0 -16-16 =50-32=18
(5-4i)² + (5+4i)² =18
2. f(x) = x²-6x+8 f(0)=8 f(1)=1-6+8=3 f(2)=4-12+8=0
pct de intersectie sunt A(0, 8) B(1,3) C(2, 0)
4. axb=9 1x9=3x3=9x1=9
ab=19, 33, 91 procent 3 %
5. M(x, y₃) 3-1=2 ( y₂- y₁) BM=AM y₃=3+2=5 M(2, 5)
6. A= AB* AD *sin A =6*3* 1/2 =18:2=9
