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25 votes
25 votes
Which expression is equivalent to x² + 2x + 2?

(x+1-i)(x+1+i) 1
(x+1-i)(x+1-i) 2
(x + 2)(x + 1) 3
(z-1+i)(z-1--i) 4

User Snowbases
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1 Answer

23 votes
23 votes

Answer:


(x+1-i)(x+1+i)

Explanation:


(x+1-i)(x+1+i)\\\\=(x+1)^2 -i^2~~~~~~~~~~~~~;[a^2 -b^2 = (a+b)(a-b)]\\\\=x^2 +2x +1 -(-1)\\\\=x^2 +2x +1+1\\\\=x^2 +2x +2

User Bitfox
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