Question

方程|x|=3解为_______.|x-3|=0解为______.3|x|=-3解为______.若|x+3|=3,则x

Answer 1

(1)|x|=3

x=±3

(2)|x-3|=0

x-3=0

x=3

(3)3|x|=-3

|x|<0

x=±1

(4)|x+3|=3

x=0或-6

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