1. 2
ax2 + bx + c a 0 , c
0 b = 0
x2- d2 d
A2 – B2 A , B
x2- d2 A2 – B2
“ ”

2. 2
1) x2 – 16
x2 – 16 = x2 – 42
2) x2 – 49
x2 – 49 = x2 –
72
3) 169 - x2
169 - x2 = 132 – x2

3. 2
4) 121 - x2
121 - x2 =
112 – x2 5)

4. 2
1
1
1

5. 2

6. 2
2