初一的整式的加减题(1) 4(a²-2ab)-3(ab-b²)+5(2a²-3b²)(2) -7x²+(6x²-5xy)-2(3y²+xy-x²)(3) 3(5m-6n)+2(3m-4n)(4) 5(a²b-2ab²+c)-4(2c+3a²b-ab²)
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![初一的整式的加减题(1) 4(a²-2ab)-3(ab-b²)+5(2a²-3b²)(2) -7x²+(6x²-5xy)-2(3y²+xy-x²)(3) 3(5m-6n)+2(3m-4n)(4) 5(a²b-2ab²+c)-4(2c+3a²b-ab²)](/uploads/image/z/1666150-70-0.jpg?t=%E5%88%9D%E4%B8%80%E7%9A%84%E6%95%B4%E5%BC%8F%E7%9A%84%E5%8A%A0%E5%87%8F%E9%A2%98%281%29+4%EF%BC%88a%26sup2%3B-2ab%29-3%28ab-b%26sup2%3B%29%2B5%282a%26sup2%3B-3b%26sup2%3B%29%282%29+-7x%26sup2%3B%2B%286x%26sup2%3B-5xy%29-2%283y%26sup2%3B%2Bxy-x%26sup2%3B%29%283%29+3%285m-6n%29%2B2%283m-4n%29%284%29+5%28a%26sup2%3Bb-2ab%26sup2%3B%2Bc%29-4%282c%2B3a%26sup2%3Bb-ab%26sup2%3B%29)
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初一的整式的加减题(1) 4(a²-2ab)-3(ab-b²)+5(2a²-3b²)(2) -7x²+(6x²-5xy)-2(3y²+xy-x²)(3) 3(5m-6n)+2(3m-4n)(4) 5(a²b-2ab²+c)-4(2c+3a²b-ab²)
初一的整式的加减题
(1) 4(a²-2ab)-3(ab-b²)+5(2a²-3b²)
(2) -7x²+(6x²-5xy)-2(3y²+xy-x²)
(3) 3(5m-6n)+2(3m-4n)
(4) 5(a²b-2ab²+c)-4(2c+3a²b-ab²)
初一的整式的加减题(1) 4(a²-2ab)-3(ab-b²)+5(2a²-3b²)(2) -7x²+(6x²-5xy)-2(3y²+xy-x²)(3) 3(5m-6n)+2(3m-4n)(4) 5(a²b-2ab²+c)-4(2c+3a²b-ab²)
(1)=4a^2-8ab-3ab+3b^2+10a^2-15b^2
=14a^2-11ab-12b^2
(2)=-7x^2+6x^2-5xy-6y^2-2xy+2x^2
=x^2-7xy-6y^2
(3)=15m-18n+6m-8n
=21m-26n
(4)=5a^2b-10ab^2+5c-8c-12a^2b+4ab^2
=-7a^2b-6ab^2-3c
(1) 14a²-11ab+12b²
(2) x²-7xy-6y²
(3) 21m-26n
(4) -7a²b-6ab²-3c