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Algebra
Question

Solve the equation. Remember, if you square both s...

Solve the equation. Remember, if you square both sides of an equation in the process of solving it, you have to check all solutions in the original equation. 

\( ( a + 1 ) - 10 \sqrt { a + 1 } + 21 = 0 \) 

\( a = \square \) Preview 

Answer

Solution
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