Math

3(x^2 + 2) - 5 = 28

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3(x^2 + 2) - 5 = 28

3(x^2) (3)(+ 2) - 5 = 28

3x^2+6-5=28

3x^2+1=28

3x^2+1-1=28-1

3x^2=27

3x^2/3=27/3

x^2=9

sqrt x^2=sqrt 9

x=3