exam Maths Puzzle Numerical Ability

I am having problem,s with this problem

Solve equations for X
x^2+4x+4=7

Thank a million for the help

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exam Other Question

A cement pipe has an outside diameter of 11 1/4 in.and a wall thickness of 1 1/8 in. What is the inside diameter of the pipe? Twice what number is equal to three times that number?