来自尚思超的问题
去括号并化简:2(a+b)+3(a-b)=(),2x²-3y-2(x²-2y)
去括号并化简:2(a+b)+3(a-b)=(),2x²-3y-2(x²-2y)
1回答
2019-12-30 16:41
去括号并化简:2(a+b)+3(a-b)=(),2x²-3y-2(x²-2y)
去括号并化简:2(a+b)+3(a-b)=(),2x²-3y-2(x²-2y)
2(a+b)+3(a-b)=2a+2b+3a-3b=5a-b
2x²-3y-2(x²-2y)=2x²-3y-2x²+4y=y