1.4a²-2(ab-3a²)+3 2.3x²-【7x-(4x+2)+2x²】-x²谢谢.拜托
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/13 05:09:08
![1.4a²-2(ab-3a²)+3 2.3x²-【7x-(4x+2)+2x²】-x²谢谢.拜托](/uploads/image/z/806192-8-2.jpg?t=1.4a%26%23178%3B-2%EF%BC%88ab-3a%26%23178%3B%EF%BC%89%2B3+2.3x%26%23178%3B-%E3%80%907x-%EF%BC%884x%2B2%EF%BC%89%2B2x%26%23178%3B%E3%80%91-x%26%23178%3B%E8%B0%A2%E8%B0%A2.%E6%8B%9C%E6%89%98)
x)33ITS645z#1ISXHϸ*ay.PIH*a.b" {=Y"}j[ 6;X-BIb44@}[
mb]JTe@9<;h(@89v69 };8#mcS` (:+
65:5(*bkE >)0H}K. A۾
1.4a²-2(ab-3a²)+3 2.3x²-【7x-(4x+2)+2x²】-x²谢谢.拜托
1.4a²-2(ab-3a²)+3 2.3x²-【7x-(4x+2)+2x²】-x²
谢谢.拜托
1.4a²-2(ab-3a²)+3 2.3x²-【7x-(4x+2)+2x²】-x²谢谢.拜托
1.4a²-2(ab-3a²)+3
=4a²-2ab+6a²+3
=10a²-2ab+3
2.3x²-【7x-(4x+2)+2x²】-x²
=3x²-7x+4x+2-2x²-x²
=-3x+2
原式=4a^2-2ab+6a^2+3=10a^2-2ab+3 原式=3x^2-[7x-4x-2+2x^2]=3x^2-[2x^2+3x-2]=3x^2-2x^2-3x+2=x^2-3x+2