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0.6是方程8x﹣2x=3.6的解. .(判断对错)
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教案备课库《2016-2017学年青岛版五年级(上)数学同步练习卷(2)》真题及答案
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8x=0这个方程没有解.判断对错
8x﹣56=0不是方程.判断对错
方程6x﹣8=8x﹣4的解是
2
﹣2
6
﹣6
8X=0是方程.判断对错
36﹣x=2.5方程的两边同时加x方程的解不变.判断对错
方程7x+3=8x的解是
x=-3
x=3
x=
x=-
X=3是方程8+2X=30的解..判断对错
方程6x﹣8=8x﹣4的解是
2
﹣2
6
﹣6
0.5分8x+5×8=72这个方程的解是x=8.判断对错
用配方法解一元二次方程x2﹣8x=9时应当在方程的两边同时加上
16
﹣16
4
﹣4
x=5是方程的解.
4x﹣2=10
17﹣2x=7
40﹣8x=36
4x+8=88
8x﹣3=5x是方程..判断对错
因为7﹣8x中含有未知数x所以7﹣8x是方程.判断对错
X=5是方程的解.
4X﹣2=10
17﹣2X=7
40﹣8X=36
4X
+
2
×
4=88
解一元二次方程x2﹣8x﹣5=0用配方法可变形为
(x﹣4)
2
=21
(x﹣4)
2
=11
(x+4)
2
=21
(x+4)
2
=11
x=5是方程的解.
4x﹣2=10
17﹣2x=7
40﹣8x=36
4x
+
8=88
方程3x+3=12与方程8x=24的未知数x的值相同..判断对错
当k为何值时关于x的方程+8x=7k+6x的解比关于x的方程k2+x=xk+2的解大6.
设抛物线的顶点在原点准线方程为x=-2则抛物线的方程是
y
2
=-8x
y
2
=8x
y
2
=-4x
y
2
=4x
方程6x﹣8=8x﹣4的解是
2
﹣2
6
﹣6
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