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28 Cards in this Set

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  • Back
i^0
1
i^1
i
i^2
-1
i^3
-i
quadratic formula
finds the roots
x equals negative B plus or minus the square root of B sqaured minus 4(a)(c) all over 2(a)
discriminant
describes the roots
the square root of b squared minus 4(a)(c)
sum of roots
-b
___

a
product of roots
c
___

a
if x>0 and perfect square:
1) roots are real, rational and unequal
2) 2 x-intercepts
if x<0, not a perfect square
1)roots are real, irrational, unequal
2)2 x-intercepts
if x=0
1)roots are real, rational and equal
2)1 x-intercept, tangent to the x-axis
if x<0
1)imaginary roots
2)no x intercepts
x^2= above the x axis
-x^2= below the x axis
what can't you have in the denominator of a fraction?
i and a radical
i^0
1
i^1
i
i^2
-1
i^3
-i
quadratic formula
finds the roots
x equals negative B plus or minus the square root of B sqaured minus 4(a)(c) all over 2(a)
discriminant
describes the roots
the square root of b squared minus 4(a)(c)
sum of roots
-b
___

a
product of roots
c
___

a
if x>0 and perfect square:
1) roots are real, rational and unequal
2) 2 x-intercepts
if x<0, not a perfect square
1)roots are real, irrational, unequal
2)2 x-intercepts
if x=0
1)roots are real, rational and equal
2)1 x-intercept, tangent to the x-axis
if x<0
1)imaginary roots
2)no x intercepts
x^2= above the x axis
-x^2= below the x axis
what can't you have in the denominator of a fraction?
i and a radical
|a+bi|
x= the square root of a^2 + b^2
the square root of a negative =
i radical number or if its a perfect square, number then i