Question
a) To what is $\sqrt{a^{2}}$ equal?b) To what is $\sqrt{a^{2}}$ equal if we know $a \geq 0$ ?
Step 1
If a is negative, then $\sqrt{a^2} = -a$. So, in general, $\sqrt{a^2} = |a|$, where |a| is the absolute value of a. Show more…
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