Topic 7 Mid Unit Reteach

Topic 7 Mid Unit Reteach

By Melynda McMillin

If you struggled with Questions 1 and 2, this is a great refresher video for you to watch.

​

adding or Subtracting Polynomials

​

​Adding and Subtracting Polynomials Notes

Multiple Choice

Find the sum.
(2x² + 5x - 7) + ( 3 - 4x² + 6x)

• 2x² + 3x +1
• -2x² - 11x -4
• 2x² + 5x -7
• -2x² + 11x -4

Multiple Choice

(4x³-5x²+3x)+(-2x³-x²+6x)

• 2x³-6x²-9x
• 2x³+6x²+9x
• -2x³-6x²+9x
• 2x³-6x²+9x

Multiple Choice

(5x⁴ - 4x³ - 2x² + x - 19) - (x⁴ + 5x³ + 8x² + x + 5)

• 4x⁴ - 9x³ - 10x² - 24
• 4x⁴ - 9x³ - 10x² - 2x - 24
• 4x⁴ - 9x³ - 10x² + 2x - 24
• -4x⁴ - 9x³ - 10x² - 24

Multiple Choice

Find the difference. 
(3- 2x + 2x²) - (4x -5 +3x²)

• x_² + 6x + 8
• 2x² + 5x - 7
• -x² -6x + 8
• -2x² + 11x - 4

Multiplying polynomials with the area model. This shows how we multiply a binomial by a binomial.

​How to multiply a binomial by a trinomial.

​

Multiple Choice

(x + 7)(x + 9)

• x² + 63x + 16
• x² + 16x + 63
• x² + 79
• x² + 16x + 2

Multiple Choice

(x - 3)(x +10)

• x² - 7x + 13
• x² - 6x - 30
• x² + 7x - 30
• x² + 13x + 30

Multiple Choice

(x - 4)(x - 6)

• x² -10x + 24
• x² - 10x - 24
• x² +10x + 24
• x² + 10x - 24

Multiple Choice

(x + 12)(x - 12)

• x² - 144
• x² + 144
• x² + 12x - 144
• x² - 12x + 144

Multiple Choice

Find the product:
(3x – 1)(x + 5) 

• 3x² + 4x + 5
• 3x² + 4x - 5
• 3x² + 14x + 5
• 3x² + 14x - 5

Multiple Choice

Simplify:
(x-7)²

• x²-49
• x²+49
• x²-14x+49
• x²-14x-49

Multiple Choice

(x + 5)² 

Hint: try (x + 5)(x + 5)

• x² + 25
• x² + 10x + 25
• x² + 10 x + 10
• x² + 10

Multiple Choice

Find the Product.
(2x + 3)(2x - 3)

• 4x² - 9 
• 4x² + 9
• 4x²- 12x - 9
• 4x² + 12x - 9

Multiple Choice

(x-3)(x²+2x+7)

• x³-x²+x-21
• x³+5x+13x-21
• x³-3x²+7x-21
• x²+2x-3

Multiple Choice

Find the shaded area. (You need to find the area of the large rectangle and the area of the small rectangle and then subtract them.)

• $$3x^2+47x+30$$  

• $$5x^2+49x+30$$  

• $$x^2+49x+30$$  

• $$x^2+45x+30$$