1 Answer

Hazy McGee · Answer 1 · 2017-01-23T08:03:07+0000

On the left side of equation is a perfect square trinomial:
a² + 2 ab + b² = ( a + b )²
x² + 4 x + 4 = 0
( x + 2 )² = 0
x + 2 = 0
x + 2 - 2 = 0 - 2
x = - 2
Answer: There is one unique value of x.

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