(44-x)(20+5x)=1600 求过程谢谢
(44-x)(20+5x)=1600 求过程谢谢
(44-x)(20+5x)=1600
880+200x-5x^2=1600
5x^2-200x+720=0
x^2-40x+144=0
(x-36)(x-4)=0
x-36=0,x-4=0
x=36,x=4
(44-X)(20+5X)=1600
展开得到 -5x²+200x-720=0
即 x²-40x+144=0
即 (x-36)(x-4)=0
得到x=36或者x=4
求解方程(44-x)(20+5x)=1600
(44-x)(20+5x)=1600
-5x²+200x-720=0
x²-40x+144=0
(x-36)(x-4)=0
x1=36 x2=4
(44-x)(20+5x)=1600求解答!
化简可以得到:
x^2-40x+144=0
(x-36)(x-4)=0
x=36或x=4
(44-x)(20+5x)=1600 怎么解?
1600=(20+5X)(44-X)
1600=-5x^2+200x+880
x^2-40x+144=0
(x-4)(x-36)=0
x=4,,x=36
求各位解下:(20+5x)×(44-x)=1600
X=4
解方程:(0.3-X)(500+10X)=120:;(44-X)(20+5X)=1600
0.3-X)(500+10X)=120 x=[(-根下248209)/20]-497/20
x=[(根下248209)/20]-497/20
(44-X)(20+5X)=1600 x=4 , x=36
880+220X-20x-5x2=1600
x2-40x+144=0
得 x1=36
x2=4
(44-x)(20+5x/2)=1600这个方程怎么解?要详细过程的,谢谢!
解:原方程化为:
(44-X)(40+5X)=3200
44*40+180X-5X*X=3200
5X*X-180X+1440=0
X*X-36X+288=0
(X-12)(X-24)=0
所以:X=12 X=24
(注:X*X即表示X的平方)
(44-X)(20+5X)=1600 用分解因式法解方程
880+220X-20X-5X^2=0,,,,,5X^2-200X+720=0,,,,,X^2-40X+144=0,,,,(X-4)(X-36)=0解得X=4或X=36