find the missing term
1. a²-81=(a+_)(a-_)
2.p²-q²=(_+_)(p-q)
3.r²-100=(_+10)(_-_)
4. b²-64=(b+_)(b-_)
5. a²-25=(a+_)(a-_)
1. a²-81=(a+_)(a-_)
2.p²-q²=(_+_)(p-q)
3.r²-100=(_+10)(_-_)
4. b²-64=(b+_)(b-_)
5. a²-25=(a+_)(a-_)
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Answer:
1, 9
2. p+q
3. r^2 r^2-10
4. 8
5. 5
completing the square