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Asked Feb 28, 2020
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19) (x +2)4 – )2 +4 = 0
5(x+2,
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19) (x +2)4 – )2 +4 = 0 5(x+2,

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Step 1

(x+2)4-4(x+2)2-(x+2)2+4=0

(x+2)2((x+2)2-4)-((x+2)2-4)=0

(x+2)2=1,(x+2)2=4

x+2=+-1,x+...

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