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GR9 Q1-L1
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GR9 Q1-L2
GR9 Q1-L1
25 cards
Cards (32)
Quadratic equation
A mathematical sentence of the second degree
Identifying a quadratic equation
1. Arrange into
standard
form ax^2 + bx + c =
0
2. a should not be
0
3. a is a
positive
real number
Parts of a quadratic equation
a
(
quadratic term)
b
(
linear term)
c
(
constant
term)
Quadratic equations
x^2 - 5x + 3 = 0
x^2 + 4x + 1 = 0
9x
^
2
- 25 = 0
1/
2x
^
2
+ 3x = 0
7x
^
2
= 1/3x
6x^2 = 9
-8x^2 + x = 6
3x
^
2
- 6x - 10 = 0
2x
^
2
+ 3x + 1 = 0
3x
^2 - x + 5 =
0
If a =
0
, the equation is no longer quadratic but
linear
If b =
0
, the equation can still be
quadratic
as long as a and c are not 0
If c =
0
, the equation can still be
quadratic
as long as a and b are not 0
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