初二计算题:1.(P+1)²-2P2.3X(X+Y)-2X(X+Y)3.(1+ab)(1-ab)4.(ab)∧7÷(ab)³5.102×986.(-7x+5)²7.(-5x-6)²8.3(x+1)(x-3)9.(5x+1)(-5x-1)10.(3×10∧8)²11.-½x(2x²-2)12.(a+1)-(a)²13.2n(n-1)-n²14.x(x-1)-(x²-y)15.(-4)∧100×(½)∧20016.-(-a)∧5.× a∧4.× (-a)∧717.-(-a²)³18.7xy÷4xy19.(-x-½)²20.-3ax÷(-a)
问题描述:
初二计算题:
1.(P+1)²-2P
2.3X(X+Y)-2X(X+Y)
3.(1+ab)(1-ab)
4.(ab)∧7÷(ab)³
5.102×98
6.(-7x+5)²
7.(-5x-6)²
8.3(x+1)(x-3)
9.(5x+1)(-5x-1)
10.(3×10∧8)²
11.-½x(2x²-2)
12.(a+1)-(a)²
13.2n(n-1)-n²
14.x(x-1)-(x²-y)
15.(-4)∧100×(½)∧200
16.-(-a)∧5.× a∧4.× (-a)∧7
17.-(-a²)³
18.7xy÷4xy
19.(-x-½)²
20.-3ax÷(-a)
答
1 p²+2p+1-2p=p²+12 3x²+3xy-2x²-2xy=x²+xy3 1-a²b²4 a^4b^45 (100+2)(100-2)=100²-2²=99966 49x²-2*5*7x+25=49x²-70x+257 (5x+6)²=25x²+60x+3...