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Learn ACT Math Algebra and coordinates

Functions and expressions

Substitute carefully.

ACT Math: Algebra and coordinates

Work through it

$f (x) = x^{2} - 1$ . Find $f (- 2)$ .

$4 - 1 = 3$

Simplify $x^{2} \cdot x^{3}$ .

$x^{5}$

Watch out for this

$(x + y)^{2} = x^{2} + y^{2}$

The middle term $2 x y$ is missing.

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