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Decide Whether the Equation Is "Conditional," an "Identity," or a "Contradiction

Question 270

Multiple Choice

Decide whether the equation is "conditional," an "identity," or a "contradiction." Give its solution set.
- 2x+5(x+1) +2=7−2x2 \mathrm { x } + 5 ( \mathrm { x } + 1 ) + 2 = 7 - 2 \mathrm { x }


A) Conditional; {0}\{ 0 \}
B) Identity; {all real numbers }\}
C) Conditional; {1}\{ 1 \}
D) Contradiction; ∅\varnothing

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