19 SAT Math Formulas you need to know

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20 Terms

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Complex Conjugate
(a+bi) (a- bi)= a²+b².
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Slope-Intercept Formula
y=mx+b
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Vertex Form of a Parabola/Quadratic
y=a(x-h)² +k
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Distance Formula
d = √((x₂-x₁)² + (y₂-y₁)²)
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Quadratic Formula
x = (-b±√(b² -4ac))/2a
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Exponent Rule(Multiplication)
a^n * a^m = a^(n+m)
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Exponent Rule(Division)
a^m/a^n = a^(m-n)
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Exponent Rule(Power raised to a Power)
(a^n)^m = a^(n*m)
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Difference of Squares
(x-y)(x+y) = x²-y²
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Complex Conjugate
(a+bi)(a-bi)=a²+b²
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Exponential Growth and Decay
y=a(1±r)^x
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Simple interest
A=Prt
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Compound interest
A=P(1+(r/n))^nt
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Area of a Equilateral Triangle(knowing a side)
A=(√(3) ∙ s²)/4
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Equation of a Circle
(x-h)² + (y-k)² = r
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Degrees to Radians
degrees * (π/180)
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Pythagorean Theorem
a^2 + b^2 = c^2
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Regular Polygon Interior Angle
180(n-2)/n
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Length of Arc in a Circle
(central angle/360)2πr
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Area of Sector in a Circle
(central angle/360)πr²