Quadratic Equations and Functions/ factoring Vocabulary
Terms in this set (17)
expressions of the form ax2+bx2+c
form ax2+bx2+c=0 where "a" does not equal to zero. May have two, one, or zero solutions.
equations of the form ax+b=0 where "a" does not equal 0 and only have one solution.
x= positive or negative square root of k (k>0)
x= 0 (k=0)
there are no real solutions (k<0)
Null Factor Law
when the product of two or more numbers is zero, then at least one of them must be zero. If ab=0 then a=0 or b=0.
Null Factor Law Steps
1. If necessary, rearrange the equation so one side is zero.
2. Fully factorise the other side (usually LHS)
3. Use the Null Factor Law
4. SOlve the resulting linear equations
5. Check at least one of your solutions
We must never cancel a variable that is a common factor from both sides of an equation unless we know that the factor cannot be zero.
If ax2+bx+c=0 where "a" does not equal to zero, then x = -b ± √(b² - 4ac)/2a
relationship between two variables which can be written in the form y=ax+bx+c where "x" and "y" are the variables and a, b, and c are constants, "a" does not equal to zero. (using function notation, can be written as f(x) = ax2+b+c
curves which can be obtained by cutting a cone with a plane. Ancient Greek mathematicians were fascinated by conic sections
name comes from the Greek word for "thrown" because when an object is thrown, its path makes a parabolic arc. Examples are parabolic mirrors used in car headlights, heaters, radar discs, etc.
Simplest Quadratic Function
y = x2
- curve is a parabola and opens upwards
- no neg. y values, curve doesnt go below the x-axis
- curve is symmetrical about y-axis
- curve has turing point or vertex at (0,0)
value of "x" where graph meets the x-axis and are found by letting "y" be 0 in the equation of the curve ( easy to find when quadratic is in factorised form)
value of y where the graph meets y-axis and are found by letting "x" be 0 in the equation of the curve (constant term in quadratic function)
factorising to find x-intercepts
any quadratic function, the x-intercepts can be found by solving the equation ax2+bx+c=0.
Graph of any quadratic function
- is a parabola
- has turning point or vertex
- is symmetrical about a line of symmetry
line of symmetry
equation of y=ax2+bx+c is x=-b/2a
YOU MIGHT ALSO LIKE...
Numbers & Animals Vocabulary | Everyday Traditional Mandarin Chinese
Algebra 2 Honors Vocabulary
Algebra 1 Final Formulas and Vocabulary
OTHER SETS BY THIS CREATOR
Cuban Revolutions Midterm
當代中文課程3 Midterm Lesson 1-5
TOCC Midterm (Lesson 1-5) Vocab
Female (19-30) Vitamin RDA
THIS SET IS OFTEN IN FOLDERS WITH...
Quadratic Functions - Vocabulary
Chapter 12 & 14 Vocabulary
Math and Music Vocabulary
Other Functions Vocab CHinundet