7th
-
8th
grade

Mathematics

70%

accuracy

plays

5 years

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