Before Spring Break Review

Solving Systems Using Elimination

100

x + 5y = 28

-x - 2y = -13

(3, 5)

200

7x - 4y = -30 

3x + 4y = 10

(-2 , 4)

300

2x - 6y = -10

4x - 6y = 10

(-15, 6) 

400

x + y = 3

-2x + 4y = 6

(1, 2) 

500

4x + y = -8 

3x + 3y = 3

(-3, 4) 

FOIL

100

(x + 2)(x - 3)

x² - x - 6

200

(2x - 1)(2x + 2)

4x² +2x - 2

300

(2x + 3)(x + 1)

2x² +5x + 3

400

(3x - 1)(4x - 2)

12x² -10x +2

500

(2x - 1)(3x + 1)

6x² - x + 1

Adding and Subtracting Polynomials

100

(2x² + 3x + 4) - (3x² +2x - 2)

-1x² + 1x + 6

200

(3x² + 2x - 4) - (2x² - 1x + 2) 

1x² + 3x - 6

300

(8x² + 3x - 4) + (2x² - 2x + 2)

10x² +1x - 2

400

(9x² - 2x + 1) - (5x² + 2x - 2)

4x² - 4x + 3

500

(2x² - 5x + 2) - (5x² + 2x + 3)

-3x² - 7x - 1

AC method factoring

100

x² - 16x + 63

(x - 7) (x - 9)

200

25x² - 15x + 2

(5x-2)(5x-1)

300

2x² - 17x + 8

(x-8)(2x-1)

400

x² - 3x -10

(x-5)(x+2)

500

x² - x - 6

(x+2)(x-3)

Solving Equations

100

16x - 15 - 9x = 13

x = 4

200

15m + 4 - 9m = -32

m = -6

300

3b - 9 - 8b = 11

b = -4

400

7 ( d - 5) + 12 = 5

d = 4

500

10a + 5(a - 3) = 15

a = 2