x-2y-5a+6=x-( )A.-2y-5a+6B.2y-5a+6C.2y+5a-6D.2y+5a+6
题型:单选题难度:简单来源:不详
x-2y-5a+6=x-( )A.-2y-5a+6 | B.2y-5a+6 | C.2y+5a-6 | D.2y+5a+6 |
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答案
x-2y-5a+6=x-(2y+5a-6),故选C. |
举一反三
下列运算正确的是( )A.2a+3b=5ab | B.2(2a-b)=4a-b | C.4a-a=3 | D.-3(x-2)=-3x+6 |
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若8x4ym和-2xny3是同类项,则nm=______. |
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