x^2-3xy+2y^2+2x-5y-3 =(x-2y)(x-y)-(x-y)+(3x-6y-3)=(x-y)(x-2y-1)+3(x-2y-1)=(x-2y-1)(x-y+3)
(3)xy+y2+x-y-2；(4)6x2-7xy-3y2-xz+7yz-2z2．解 (1)原式=(x-5y+2)(x+2y-1)．(2)原式=(x+y+1)(x-y+4)．(3)原式中缺x2项，可把这一项的系数看成0来分解．原式=(y+1)(x+y-2)．(4)原式=(2x-3y+z)(3x+y-2z)．说明 (4)中有三个字母，解法仍与前面的...
8x2y+9xy−xy2 Explanation: Remove the brackets 10x2y+3xy−2xy2+xy2−2x2y+6xy 8x2y+9xy−xy2 (3x2y−6y2+4x)−(2xy2+x−7x2y) https://www.tiger-algebra.com/drill/(3x~2y...
【解答】解:∵x2+3xy+2y2=(x+2y)(x+y),x2+4x+3=(x+1)(x+3),2y2+5y+3=(2y+3)(y+1),∴x2+3xy+2y2+4x+5y+3=(x+2y+3)(x+y+1). 【分析】利用x2+3xy+2y2=(x+2y)(x+y),x2+4x+3=(x+1)(x+3),2y2+5y+3=(2y+3)(y+1)即可得出.反馈...
解答:解:∵x2+3xy+2y2=(x+2y)(x+y), x2+4x+3=(x+1)(x+3), 2y2+5y+3=(2y+3)(y+1), ∴x2+3xy+2y2+4x+5y+3=(x+2y+3)(x+y+1). 点评:本题考查了因式分解的方法,属于基础题. 练习册系列答案 期末加假期期末大赢家冲刺100分西安出版社系列答案 ...
解：x^2+3xy+2y^2-4x-5y+3 =（x+y）（x+2y）-4x-5y+3 =（x+y-1）（x+2y-3）
解：已知2x+5y-3=0 得2x+5y=3 则4的x次方×32的y次方 =（2的2次方）的x次方×（2的5次方）的y次方 =2的2x次方×2的5y次方 =2的（2x+5y）次方 =2的3次方 =8 即4的x次方×32的y次方=8
【解析】2x+5y-3=02x+5y=34^x*32^y=2^(2x)*2^(5y)=2^(2x+5y)=2^3=8.【同底数幂的乘法运算】1同底数幂的乘法法则:同底数幂相乘,底数不变,指数相加.即am.an=am+n(m,n是正整数.2推广:am.an.a=am+n+p(m,n,p均是正整数.3在应用同底数幂的乘法法则时,应注意:①底数必须相同,如a2b2)...
若5y+2 与 x-3 成正比例,则 y 是 x 的 A.正比例函数B.一次函数C.没有函数关系D.以上答案均不正确
https://socratic.org/questions/how-do-you-simplify-frac-2x-2-y-x-3-3-times-frac-y-1-2x-2 32x−1y Explanation: Given, [x32x2y]3.[2xy1]−2 ⇒[x2y]3.[y2x]2 ... How do you simplify 6x23x×y−32y−6 ? https://socratic.org/questions/how-do-you-simplify-3x-6x-...