√a means the nonnegative number that squares to a. √(ab) = √a × √b when both are nonnegative. √50 = 5√2. Exponent rules sit next door, in exponent rules.
Pull out perfect squares
Factor the inside, take out pairs. √(x²) is |x|, not plain x, unless the problem restricts the domain. Equations that start with a radical are in radical equations.
GCF and LCM are a different leftover skill, in GCF and LCM. The short list is in ACT Math formulas.
The bottom line
Nonnegative root. Factor out perfect squares. Check the original if you squared.
Start practicing
Start with a free diagnostic, then drill your weak spots with 15-question quizzes and track how you're doing across Reading, English, and Math. Compare plans whenever you're ready to go further.
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