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
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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
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)
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
1 p²+2p+1-2p=p²+1
2 3x²+3xy-2x²-2xy=x²+xy
3 1-a²b²
4 a^4b^4
5 (100+2)(100-2)=100²-2²=9996
6 49x²-2*5*7x+25=49x²-70x+25
7 (5x+6)²=25x²+60x+36
8 3(x²-3x+x-3)=3(x²-2x-3)=3x²-6x-9
9 -(5x+1)²=-(25x²+10x+1)=-25x²-10x-1
10 3²*10^16=9*10^16
11 -½x2(x²-1)=-x³+x
12
13 2n²-2n-n²=n²-2n
14 x²-x-x²+y=y-x
15 4^100/(2²)^100=4^100/4^100=1
16 -a^5*a^4*-a^7=a^(5+4+7)=a^16
17 a^6
18 7/4
19(x+½)²=x²+x+1/4
20 3x