Add the polynomials. Assume all variable exponents represent whole numbers.
-$$\left( \frac { 3 } { 5 } x ^ { 2 } + \frac { 3 } { 4 } x - \frac { 4 } { 5 } \right) + \left( \frac { 3 } { 4 } x ^ { 2 } - \frac { 2 } { 5 } x - \frac { 1 } { 4 } \right)$$
A) $\frac { 27 } { 20 } x ^ { 2 } + \frac { 7 } { 20 } x - \frac { 21 } { 20 }$
B) $\frac { 27 } { 20 } x ^ { 4 } + \frac { 7 } { 20 } x ^ { 2 } - \frac { 21 } { 20 }$
C) $\frac { 9 } { 2 } x ^ { 2 } - 3 x + 2$
D) $\frac { 17 } { 10 } x ^ { 6 } - \frac { 21 } { 20 }$

Question

Quizplus · Accepted Answer

To add the polynomials, combine like terms: $\frac{3}{5}x^2 + \frac{3}{4}x^2 = \frac{27}{20}x^2$, $\frac{3}{4}x - \frac{2}{5}x = \frac{7}{20}x$, and $-\frac{4}{5} - \frac{1}{4} = -\frac{21}{20}$.

Add the Polynomials A) 2720x2+720x−2120\frac { 27 } { 20 } x ^ { 2 } + \frac { 7 } { 20 } x - \frac { 21 } { 20 }2027​x2+207​x−2021​

Add the Polynomials A) $\frac { 27 } { 20 } x ^ { 2 } + \frac { 7 } { 20 } x - \frac { 21 } { 20 }$