algebra 2

vocab

100

What does it mean when you cant multiply matrices? 

the matrix is undefined 

200

Scalar?

real number

300

A set of 3 linear equations?

system of 3 linear equations

400

Ways you can solve a system of equations?

1. substitution

2. elimination

3. graphing

500

What is the leading coefficient in a simple trinomial?

a 1

matrix

100

2x+y=4

3x-y=6

[2 1 \ 4]

[3 -1 \ 6]

200

-6x+2y=10

4x=-20

[-6 2 \ 10]

[4 0 \ -20]

300

R=[4 -2] [5 -4] 

S=[8 0 -1 0] [2 -5 1 8] 

2*4 2*2

undefined

400

find the difference

5A=[2 3 -7] [1 4 5]

3B= [3 0 6] [-1 8 2]

[1 15 -53] 

[8 -4 19]

500

4x+2 [3 4] = [10 0]

        [-2 1]    [4 2]

x= [1 -2]

     [2 0]

linear equations

100

3x+7y=15

5x+2y=-4

y=3

x=-2

200

3x-2y=14

2x+2y=6

x=4

y=-1

300

y=2x+3

-2x+y=1

no solution

400

2x-3y=18

-2x+3y=-6

no solution 

500

4x+2y+3z=12

2x-3y+5z=-7

6x-y+4z=-3

x=-1

z=2    or  (-1,5,2)

y=5

trinomials

100

x²+8x+7

(x+1)(x+7)

200

c²+64 

PRIME

300

9x²-1

(3x+1)(3x-1)

400

3x²-16x+5

(3x-1)(x-5)

500

9b²-19b-18

PRIME