Question

Add the following polynomials:

$\frac{2}{3}{y}^3-\frac{1}{3}{y}^2+\frac{5}{6}y+7$, $\frac{4}{3}{y}^3-\frac{2}{3}{y}^2+\frac{1}{y}+3$

• A. $2y^3+y^2+y+10$
• B. $2y^3-y^2+y+10$
  
• C. $2y^3-y^2-y+10$
• D. $2y^3+y^2+y-10$

Answer 1

The correct option is B $2y^3-y^2+y+10$

$\frac{2}{3}{y}^3-\frac{1}{3}{y}^2+\frac{5}{6}y+7$ + $\frac{4}{3}{y}^3-\frac{2}{3}{y}^2+\frac{1}{y}+3$ $=2y^3-y^2+y+10$