去括号,并合并同类项:1/2(x^2-y)+1/3(x-y^2)+1/6(x^2+y^2)
问题描述:
去括号,并合并同类项:1/2(x^2-y)+1/3(x-y^2)+1/6(x^2+y^2)
答
现在baidu真的很方便.这么简单的题一定要自己动动脑子思路是:展开括号 ---- 统一分母 ---- 合并同类项 ---- 约分化简1/2(x^2-y)+1/3(x-y^2)+1/6(x^2+y^2)=1/2*x^2-1/2*y+1/3*x-1/3*y^2+1/6*x^2+1/6*y^2=3/6*x^2-3/6...