分式化简求值50道

养味录170750道化简求值计算题 -
蓬眨岩13653995845 ______[答案] 化简求值 3.3ab-4ab+8ab-7ab+ab=______. 4.7x-(5x-5y)-y=______. 5.23a3bc2-15ab2c+8abc-24a3bc2-8abc=______. 6.-7x2+6x+13x2-4x-5x2=______. 7.2y+(-2y+5)-(3y+2)=______. 11.(2x2-3xy+4y2)+(x2+2xy-3y2)=______. 12.2a-(3a-2b+2)+(3a-4b-1)=...

养味录1707分式的化简与求值45道 -
蓬眨岩13653995845 ______ . -9(x-2)-y(x-5) 当x=5,y=12时,求式子的值.2. 5(9+a)*b-5(5+b)*a 当a=5/7时,求式子的值.3. 62g+62(g+b)-b 当g=5/7,b=16时,求式子的值.4. 3(x+y)-5(4+x)+2y 当x=9,y=2时,求式子的值.5. (x+y)(x-y) 当x=0.45,y=0.65时,求式子的值.6. 2ab+a*a-b 当a...

养味录1707求初二下分式化简求值的题3道 -
蓬眨岩13653995845 ______ 1 化简或求值:若解x的分式方程2/(x-2)+mx/(x^2-4)=3/(x+2)会产生增根,求m的值 化简或求值:若解关于x的分式方程2/(x-2)+mx/(x^2-4)=3/(x+2)会产生增根,求m的值 答案: 2/(x-2)+mx/(x^2-4)=3/(x+2) 2(x+2)/(x^2-4)+mx/(x^2-4)-3(x-2)/(x^2-4)=0 (2x+4+mx-3x+6)/(x^2-4)=0 mx-x+10=0 x=10/(1-m) 因为方程有增根 所以X=2或-2 即m=6或-4

养味录1707求初二下分式化简求值的题3道难度大些 -
蓬眨岩13653995845 ______[答案] 1 化简或求值:若解x的分式方程2/(x-2)+mx/(x^2-4)=3/(x+2)会产生增根,求m的值 化简或求值:若解关于x的分式方程2/(x-2)+mx/(x^2-4)=3/(x+2)会产生增根,求m的值答案: 2/(x-2)+mx/(x^2-4)=3/(x+2) 2(x+2)/(x^2-4)+mx...

养味录1707化简求值题及答案 -
蓬眨岩13653995845 ______ 1.(3X+2Y)+(4X+3Y)其中X=5,Y+3 解:原式=3X+2Y+4X+3Y=7X+5Y 当X=5,Y=3时 原式=5*7+(-3)*5+20 2.(5a^2-3b^2)+(a^2+b^2)-(5a^2+3b^2),其中a=-1,b=1 =5a^2-3b^2+a^2+b^2-5a^2-3b^2 =a^2-5b^2 =(-1)^2-5*1^2 =1-5 =-4 3.2(a^2b+ab^2)-2(a...

养味录1707因式分解,解方程组,化简求值(或计算)各50题 -
蓬眨岩13653995845 ______ 因式分解: (1).3y²-5xy-2y=(3x+y)(x-2y) (2).x³-5x²+6x=x(x-2)(x-3) (3).a²+2a+1-b²=(a+1)²-b²=(a+b+1)(a-b+1) (4).(x²-2x)²+2(x²-2x)+1=[(x²-2x)+1]²=[(x-1)²]²=(x-1)^4 化简并求值: (2a+b)²-(3a-b)²+5a(a-b),其中a=1,b=五分之一 (2a+b)²-(3a-b)²+5a(a-b) =4a²+4ab+b²-(9a²-6ab+b²)+5a²-5ab =5ab =5*1*1/5 =1

养味录1707化简求值,数学分式计算题
蓬眨岩13653995845 ______ (a+2b)(a-b)/(a+b)(a-b)+2b²/(a²-b²) =(a²-ab+2ab-2b²+2b²)/(a²-b²) =(a²+ab)/(a²-b²) =a/(a-b) =-2/(-2-1/3) =6/7

养味录1707初二分式的乘法 化简求值的题目 -
蓬眨岩13653995845 ______[答案] 除以分式相当于乘以他的倒数. 右边分式倒过来,变成乘法. 化简完应该是(m-n)平方/(m+n)平方 代入=0.16

养味录1707分式化简求值题
蓬眨岩13653995845 ______ 结果是 -1/(X+2)

养味录1707分式化简求值题目
蓬眨岩13653995845 ______ (xy+2y2) / (x+y) =y(x+2y) / (x+y) x^3-4x^2y+4xy^2 =x^3-2x^2y-2x^2y+4xy^2=x^2 (x-2y) -2xy (x-2y)=x (x-2y)^2 x2—4y2=(x+2y) (x-2y) x2—2xy=x(x-2y) (xy+2y2) / (x+y) * (x^3-4x^2y+4xy^2)/(x2—4y2 ) =y(x+2y) / (x+y) * x (x-2y)^2 / [(x+2y) (x-2y) ] =xy (x-2y...