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 social security number has nine digits. How many social security numbers are possible? The sum of the areas of two squares is 225. If one square is 3 units larger per side then the other, find the sizes of the squares.