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数学7上：3x²-2x+b与x²+bx-1的和，不含x的一次项，怎么说明？
数学7上：若3x²-2x+b与x²+bx-1的和，不含x的一次项，怎么说明？
七年级数学，代数式，单项式，多项式，整式加减，化简培优专题83/164
![数学7上：(2a²b+2ab²)-[2(a²b-1)+3ab²+2]，整式加减化简求值](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/321efccad2da40a093e3da72df4f5732~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&biz_tag=list_custom%2Fnone&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20250120093016AA055D1F7336D9E66627&requestFrom=704&version_code=80402&x-expires=1768872616&x-signature=L9zk55k62F2cJf1OObLGbr0lQRk%3D)
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