adding and subtracting algebraic fractions

Simplify the expression

• n / 2m 
• n / 3m 
• (m² + 4n²) / 12m
• n / 4m 

Tags

CCSS.HSA.APR.D.7

Simplify the expression.
 $\frac{2}{x^2-x-20}+\frac{3}{x^2+7x+12}$  

•  $\frac{5x+21}{\left(x-5\right)\left(x+4\right)\left(x+3\right)}$  

•  $\frac{5x-11}{\left(x-5\right)\left(x+4\right)\left(x+3\right)}$  

•  $\frac{5x+9}{\left(x-5\right)\left(x+4\right)\left(x+3\right)}$  

•  $\frac{5x-9}{\left(x-5\right)\left(x+4\right)\left(x+3\right)}$  

Tags

CCSS.HSA.APR.D.7

What is the sum of the following expressions

• x²+6x / (x+2)(x-2)

• (x-2) / (x+2)

• (x+2) / (x-2)

• x³-3x+5 / (x²-4)(x+2)

Tags

CCSS.HSA.APR.D.7