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- 1. Multiple Choice
(a-3)(a+3)=
a2-9
a2-3
a-9
a2-6a+9
- 2. Multiple Choice
(x-5)(x+5)=
x2-5
x2-25
x2+25
x2-6x+25
- 3. Multiple Choice
(x+7)(x-7)=
x2+49
x2-7
x2-49
x2-14x+49
- 4. Multiple Choice
(x+2y)(x-2y)=
x2-4y+4y2
x-2y
x2-2y2
x2-4y2
- 5. Multiple Choice
(3x+5y)(3x-5y)=
9x2-4y+25y2
9x2-25y2
3x2-5y2
25x2-9y2
- 6. Multiple Choice
(x+√5)(x-√5)=
x2-5
x2-25
x2+5
x2-√5
- 7. Multiple Choice
(√7+√5)(√7-√5)=
√7-√5
2
√7+√5
12
- 8. Multiple Choice
(√6+1)(√6-1)=
5
√5
√6+√5
7
- 9. Multiple Choice
(x-1)(x+1)(x2+1)=
x2-1
x2+1
x4+1
x4-1
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