问题标题:
因式分解(1)y的4次方-y²=6,(2)(y-1)²-6(y+1)=-8(2)(y+1)²-6(y+1)=-8
问题描述:

因式分解(1)y的4次方-y²=6,(2)(y-1)²-6(y+1)=-8

(2)(y+1)²-6(y+1)=-8

何友金回答:
  (1)y的4次方-y²=6y的4次方-y²-6=0(y²-3)(y²+2)=0(y+√3)(y-√3)(y²+2)=0∴y=√3或y=-√3(2)第二题应该是:(y+1)²-6(y+1)=-8(y+1)²-6(y+1)=-8(y+1)²-6(y+1)...
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