①(x+1)²=2②(x+1)³+8=0
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①(x+1)²=2②(x+1)³+8=0
①(x+1)²=2
②(x+1)³+8=0
①(x+1)²=2②(x+1)³+8=0
①(x+1)²=±√2 x=-1+√2 或 x=-1-√2
②(x+1)³+8=0 x+1=-2 x=-3
①(x+1)²=2解x+1=1或-1当x+1=1时x=0当x+1=-1时x=-2
②(x+1)³+8=0 解(x+1)³=-8 则x+1=-2所以x=-3
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①(x+1)²=2
x+1=土√2
x1=-1+√2 x2=-1-√2
②(x+1)³+8=0
x+1=-2
x=-3