Quiz over 6-3 & 6-4

What is the LCD?           $\frac{\left(x^2+1\right)}{3\left(x-1\right)}+\frac{3}{\left(2x-7\right)}$  

•  $\left(x-1\right)\left(2x-7\right)$  

•  $3\left(2x-7\right)$  

•  $3\left(x^2+1\right)$  

•  $3\left(x-1\right)\left(2x-7\right)$  

What is the LCD?  $\frac{x}{x^2-9}-\frac{1}{x+3}+\frac{2x}{x-3}$  

•  $x\left(x+3\right)\left(x-3\right)$  

•  $\left(x+3\right)\left(x^2-9\right)\left(x-3\right)$  

•  $\left(x-3\right)\left(x^2-9\right)$  

•  $\left(x+3\right)\left(x-3\right)$  

Tags

CCSS.HSA.APR.D.7

What is the LCD?     $\frac{x-3}{x^2-2x-3}-\frac{5}{x^2-9}$  

•  $\left(x-3\right)\left(x+1\right)_{ }$  

•  $\left(x-3\right)\left(x+3\right)$  

•  $\left(x-3\right)\left(x+1\right)\left(x+3\right)$  

•  $\left(x+1\right)\left(x+3\right)$  

Tags

CCSS.HSA.APR.D.7

What is the LCD?  $\frac{\left(x-7\right)}{x^2-9}+\frac{\left(x^2-25\right)}{x+9}$  

•  $\left(x-3\right)\left(x+3\right)\left(x+9\right)$  

•  $\left(x-7\right)\left(x^2-9\right)$  

•  $\left(x-9\right)\left(x+9\right)$  

•  $\left(x-5\right)\left(x+5\right)\left(x+9\right)$  

Tags

CCSS.HSA.APR.D.7

Multiply the polynomials.

(5x+1)(x+4)

• 5x²+ 19x − 4

• 5x²+ 21x + 4

• 5x² + 4

• 5x² − 19x − 4

Multiply the expressions.

x³(2x²+3x)

• 2x⁵+3x⁴

• 2x⁶+3x³

• 5x⁹

• 5x

Factor Completely:
x² - 36

• (x + 9)(x - 4)
• (x - 6)(x - 6)
• (x - 9)(x + 4)
• (x + 6)(x - 6)

Tags

CCSS.HSA.APR.C.4

Factor the following.

w³ + 3w

• 3w(1)

• w(w² + 3)

• w³(w + 3)

What must you check for once you have solved a rational equation?

• Negative answers.

• Make sure the solution/solutions does not cause the numerator = 0.

• Make sure the solution/solutions does not cause the denominator = 0.

• Positive answers.

Solve for v

• - 7/6
• - 9/5
• 9/5
• -3

Tags

CCSS.HSA.REI.A.2