题目内容
(1)4x
(-3x
y-
)÷(-6x-
y-
);
(2) 求值:lg5+lg2-(-
)-2+(
-1)0+log28.
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(2) 求值:lg5+lg2-(-
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(1)4x
(-3x
y-
)÷(-6x-
y-
)=(-12x
+
y-
)÷(-6x-
y-
)
=2x
+
y-
+
=2xy
,
(2)lg5+lg2-(-
)-2+(
-1)0+log28
=lg10-32+1+3log22=-4
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=2x
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(2)lg5+lg2-(-
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=lg10-32+1+3log22=-4
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