ajuto orice ce stiti va dau pct

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