How do you solve $a^2=4$ ?

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How do you solve $a^2=4$ ?

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Answer 1 · 2017-06-18T23:11:50

Take the square root of each side of the equation to solve for $a$ . However, remember the square root of a number produces a positive and negative result:

$sqrt(a^2) = +-sqrt(4)$

$a = +-2$

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How do you solve $a^2=4$ ?

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