Quadratic Trinomials
Quadratic Trinomials
Trinomials to the 4th Degree
Test Review
Math Riddles (don't be mad)
100
x^2+3x-4
(x+4)(x-1)
Check: (4)(-1) = -4 and
(4)+(-1)=3
100
n^2-n-42
(n-7)(n+6)
Check: (-7)(6)=-42
and (-7)+(6)=-1
100
x^4-4x^2-21
(x^2-7)(x^2+3)
check: (-7)(3)=-21
and (-7)+(3)=-4
100
Is the relation in the graph a function? Why?
Yes it is a function, because it passes the vertical line test (show vertical lines across the relation)
100
Which month has 28 days?
All 12 months
200
n^2+n-20
(n+5)(n-4)
Check: (5)(-4) = -20 and
(5)+(-4)=1
200
x^2+4x-21
(x+7)(x-3)
Check: (7)(-3)=-21
and (7)+(-3)=4
200
x^4+3x^2-10
(x^2+5)(x^2-2)
check: (5)(-2)=-10
and (5)+(-2)=3
200
Is the table a function? Justify. 
Step 1: D={-3, -2, 2} and R={0,1,2,3}
Step 2: Draw the map (label the bubbles)
Step 3: No it is not a function not every input is assigned exactly one output. (OR No, because input -3 is assigned two outputs)
200
What number goes up and doesn’t come back down?
Your age
300
x^2+2x-15
(x+5)(x-3)
Check: (5)(-3)=-15 and
(5)+(-3)=2
300
x^2-16x-36
(x-18)(x+2)
Check: (-18)(2)=-36
and (-18)+(2)=-16
300
x^4-2x^2-8
(x^2-4)(x^2+2)
check: (-4)(2)=-8 and (-4)+(2)=-2
300
Subtract
x^2+2x-11
from
3x^2+8x-7
ANSWER: 2x^2+6x+4
Because:
(3x^2+8x-7)-(x^2+2x-11)
(3x^2+8x-7)+(-x^2-2x+11)
300
If there are 4 apples on the table and you take away 3, how many do you have?
Three apples
400
x^2-6x-27
(x-9)(x+3)
Check: (-9)(3)=-27
and (-9)+(3)=-6
400
x^2+6x -27
(x+9)(x-3)
Check: (9)(-3)=-27
and (9)+(-3)=6
400
x^4-x^2-56
(x^2-8)(x^2+7)
Check: (-8)(7)=-56
and (-8)+(7)=-1
400
Find the range of the function,
f(x)=3x^2
if the domain is {-3,0,4,6}
Range= { 27, 0, 48, 108} because...
3(-3)2 = 27
3(0)2 = 0
3(4)2 = 48
3(6)2 = 108
400
What weighs more, a pound of iron or a pound of feathers?
Both would weigh the same
500
x^2+x-6
(x+3)(x-2)
Check: (3)(-2)=-6
and (3)+(-2)=1
500
x^2-3x-28
(x-7)(x+4)
Check: (-7)(4)=-28
and (-7)+(4)=-3
500
x^4-3x^2-18
(x^2-6)(x^2+3)
Check: (-6)(3)=-18
and (-6)+(3)=-3
500
Find the product of
(x -3) and (x^2-4x+5)
What is
x^3-7x^2+17x-15
500
What did one math book say to the other math book?
Do you want to hear my problems?