Geo 8/17:: Algebra Review #3

-x²+7x-10+4x²-6x+8

• 4x²+13x+18
• 3x²-x+2
• 3x²+x-2
• 6x²-2x-2

Simplify the following expression by combining like terms:
3(2x - 4) + 6x - 1

• 12x - 13
• 12x - 5
• 11x - 2
• -x

• x = 2

• x = -1

• x = 12

• x = 6

• m = 3

• m = -2

• m = -4

• m = 1

y = -6x + 5
-2x + y = 5

• (-3, -6)
• (-6, 3)
• (0, 5)
• (-3, 5)

y = 2x + 5
-4x + y = 9

• (-2, 1)
• (-2, -1)
• (2, -1)
• (2, 1)

Solve by elimination:
4x+9y=28
-4x-y=-28

• (-7,0)
• (6,0)
• (-6,0)
• (7,0)

Solve by elimination.

6x - y = 2

-3x - 6y = 12

• (2,0)

• no solution

• (0,-2)

• infinite solutions

Solve the system of equations by elimination.
-x + y = -13
-8x - 4y = -8 

• (5, 8)
• (5, -8)
• (-5, -18)
• (-5, 8)

(2x-1)(x+5)