(3m+2n)(7m-6n)
来源:学生作业帮助网 编辑:作业帮 时间:2024/12/02 12:23:25
xݐn0_%Sr1T8cmE v,0wv(S-0(uwaS\fx$8*oJ쭳/\X2y!PhCݖYd0=pEjYYTPGi"0p#/V(*d}pOchgv/{fYEl[;qJNH
(3m+2n)(7m-6n)
(3m+2n)(7m-6n)
(3m+2n)(7m-6n)
原式=3m(7m-6n)+2n(7m-6n)
=21m²-18mn+14mn-12n²
=21m²-4mn-12n²
3X+Y=K+1 (1)
X+4Y=3 (2)
(1)*5-(2)*4
15X+5Y-4X-16Y=5K+5-12
11X-11Y=5K-7
2
3<5K-7<13
所以3<11X-11Y<13
3/11
(1...
全部展开
3X+Y=K+1 (1)
X+4Y=3 (2)
(1)*5-(2)*4
15X+5Y-4X-16Y=5K+5-12
11X-11Y=5K-7
2
3<5K-7<13
所以3<11X-11Y<13
3/11
(1)*5-(2)*4
15X+5Y-4X-16Y=5K+5-12
11X-11Y=5K-7
2
3<5K-7<13
所以3<11X-11Y<13
3/11
收起
计算(3m+2n)(7m-6n)
(3m+2n)(7m-6n)
(m-n)^7/(n-m)^6+(-n-m)^3/(m+n)^2急用!
3(m-n)²-7(m-n)-3(m-n)²+6(m-n)
(m-5n)(m-n)-6(m+2n)(m-3n)计算,要有过程
计算(m+4n)(m-n)-6(m+2n)(m-3n)
(m-5n)(m-n)-6(m+2n)(m-3n)
(m+4n)(m-n)-6(m+2n)(m-3n)
(m+4n)(m-n)-6(m+2n)(m-3n),
.4(m+n)^2*(m+n)^3-7(m+n)(m+n)^4+5(m+n)^5=
3m(m+n)-6(m^2-n^2)
5n(2m+3n)-(2m+3n)(n-7m)
m+n/2-2m-n/8=2 2m+m-3n/7=-6 二元一次方程
m-{n-2m+[3m-(6m+3n)+5n]}=
m-{n-2m+[3m-(6m+3n)-5n]}化简
m/n=7/3则m+n/m-n
[(m-n)^2*(m-n)^3]^2/(m-n)^4
[(m-n)^2*(m-n)^3]^2/(m-n)^4