ALEKS Math formulas for problems found on the SAT and ACT
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Course
Math Placement
Institution
Math Placement
ALEKS
Math formulas for problems found on the SAT and ACT. While the SAT lists many of the formulas at the beginning of each math test, the ACT does not. And, you will save time if you memorize these.
Quadratic Formula - ANSWER -b±[√b²-4ac]/2a
ALEKS
Math formulas for problems found on the SAT and ACT. While the SAT lists many of the formulas
at the beginning of each math test, the ACT does not. And, you will save time if you memorize
these.
Quadratic Formula - ANSWER -b±[√b²-4ac]/2a
Slope - ANSWER (y₂-y₁)/(x₂-x₁)
Slope-Intercept - ANSWER y=mx+b
a³-b³ - ANSWER (a-b)(a²+ab+b²)
a³+b³ - ANSWER (a+b)(a²-ab+b²)
a²-b² - ANSWER (a-b)(a+b)
, a²-2ab+b² - ANSWER (a-b)²
a²+2ab+b² - ANSWER (a+b)²
(a+b)(c+d) - ANSWER ac+ad+bc+bd
a(b+c) - ANSWER ab+ac
sine ratio - ANSWER opposite ÷ hypotenuse
cosine ratio - ANSWER adjacent ÷ hypotenuse
tangent ratio - ANSWER opposite ÷ adjacent
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