Addition/Subtraction of Rational Expressions

Addition/ Subtraction of Rational Expressions

By HCBMasilang

Instructions

1. Answer the following questions within the given period (2 minutes per question).

2. Make sure to prepare a scratch paper before proceeding to the next slide.

3. This is a 7-item multiple choice questions. Each question is worth 2 points.

4. Good luck!

Multiple Choice

What is the sum of the given expression?

$$\frac{x-2}{3x}+\frac{2x-4}{3x}$$

• -2

• (x - 2) / x

• (x + 4) / 3x

• (x - 4) / 3x

Multiple Choice

What is the difference of the expression below?

$$\frac{n^2-5}{4n^2-4}-\frac{n-3}{4n^2-4}$$

Multiple Choice

What is the LCD of the following expressions:

$$\frac{1}{8u^2v},\ \frac{u-v}{12uv^3},\ \frac{2u^2-1}{18u^3v^2}$$

• 2uv

• 6u^2v

• 36u^2v^2

• 72u^3v^3

Multiple Choice

What is the LCD of the following expressions:

$$\frac{2c}{c-1},\frac{c-2}{1-c^2}$$

• 2c(c - 2)

• c^2 - 1

• 2c(c - 2)

• (c - 1)(1 - c^2)

Multiple Choice

What is the sum of the expression below?

$$\frac{1-b}{2b^2}+\frac{2}{3b}$$

• (b - 4) / 3b

• (b + 2) / 6b^2

• 4 / 3b

• (b + 3) / 6b^2

Multiple Choice

What is the difference of the expression below?

$$\frac{2m}{2m-1}-\frac{5-m}{2m^2+7m-4}$$

• 1/4

• (m + 5) / (m + 4)

• (m - 5) / (2m - 1)(m + 4)

• (2m^2 - 5) / (2m - 1) (m + 4)

Multiple Choice

Simplify the expression below:
$$-\frac{4}{x+2}+\frac{3}{x-1}-\frac{12}{x^2+x-2}$$

• 1/(x + 2)

• -1/(x - 1)

• 13/(x + 2)(x - 1)

• (2x - 9)/(x + 2)(x - 1)