Algebra Review

Backwards Thinking

100

x² = 16

-4 and 4

200

Solve:

2x²-5 = 45

-5 and 5

300

Solve:

3x² - 7 = 293

-10 and 10

400

Solve:

8x²+7-4x²+13 = 2x² + 92

-6 and 6

500

Solve:

2x(5x-1)+2x-8 = 482 

-7 or 7

ZiPPy

100

Solve (3x+1)(x-2)=0

-1/3 and 2

200

Solve:

x²+7x+10=0

-2 and -5

300

Solve:

2x²-9x-5=0

-1/2 and 5

400

Solve:

x²+4x-5=16

3 and -7

500

Solve:

(x+1)(x+3)=8

1 and -5

Walk the line

100

Graph y= 2x - 1

y-int is -1, slope is 2

200

Graph y = -1/2x + 6

y-int is 6, slope is -1/2

300

Graph x = 3

vertical line

400

Graph y = 2

Horizontal line

500

Graph 3x - 2y = 12

Intercepts at (0,-6) and (4,0)

It's systematic

100

Solve by substitution:

y=3x-4

2x+2y=24 

(3,5)

200

Solve by substitution:

x =2y+1

4x+y=49

(11,5)

300

Solve by elimination:

2x+3y=18

5x-3y=24

(6,2)

400

Solve by elimination:

4x+3y=17

5x-y = 26

(5,-1)

500

Solve by substitution:

y=2x+3

4x-5y=9

(-4,-5)

Plug it in Plug it in

100

Evaluate if x=2

3x+7

13

200

Evaluate if x=5

(2x+1)(x-3)

22

300

Evaluate if x=3

10(x+5)²-6

634

400

Evaluate if x=2

5x²+4x-1

27

500

Evaluate if x=2

4+3(2x-6)²

16