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Slope
 m=y_{2}y_{1}
 x_{2}x_{1}

Slopeintercept form of a linear equation
y=mx+b

Pointslope form of a linear equation
y=m(xx_{1})+y_{1}

Standard form of a quadratic equation
ax^{2}+bx^{2}+c=0

Vertex form of a quadratic equation
y=a(xh)^{2}+k (h,k) vertex


Difference of two squares
a^{2}b^{2}=(ab)(a+b)

Pythagorean Theorem
c^{2}=a^{2}+b^{2}

Domain of a function
The set of all xvalues of the ordered pairs in a relation

Range of a function
The set of all yvalues of the ordered pairs in a relation

Vertex, Minimum, Maximum
The lowest point on the graph of a parabola that opens upward or the highest point on the graph of a parabola that opens downward

Imaginary number (i)
a number denoted i whose properties are i=√1 and i^{2}=1

Zeroproduct Property
For all real numbers a and b , if ab=0, then a=0 or b=0 (or both)

Conjugate
The conjugate of a+bi is abi

Vertex formula (xcoordinate)
x=b/2a

Completing square method
Add (b/2)^{2} to both sides



