Question

Pls
Dau coroana!!!!!!​

Answer 1

1. (x+3)² = x² +2•x•3 +3²= x²+6x+9
2. (x-5)² = x²-2•x•5 +5²= x²- 10x+25
3. (4-✓11)(4+✓11)= 4²-✓11² = 16-11=5

Deci,

1. A
2. F
3. A

Am folosit formulele de calcul prescurtat:

1. (a+b)²=a²+2ab+b²
2. (a-b)²=a²-2ab+b²
3. (a+b)(a-b)=a²-b²