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\sqrt{x^2}=|x|
x
2
=
∣
x
∣
\sqrt{x^2}=|x|
x
2
=
∣
x
∣
In 8 past-paper questions
What this skill is
Understanding why
x
2
=
∣
x
∣
\sqrt{x^2}=|x|
x
2
=
∣
x
∣
, rather than
x
x
x
in general, and applying this when simplifying expressions whose sign must be considered.
