Add or subtract as indicated.
-$\left( 9 x ^ { 2 } y ^ { 2 } + 10 y ^ { 4 } \right) + \left( 7 x ^ { 2 } y ^ { 2 } + 5 y ^ { 4 } \right)$
A) $16 x ^ { 4 } y ^ { 4 } + 15 y ^ { 8 }$
B) $16 x ^ { 2 } y ^ { 2 } + 15 y ^ { 4 }$
C) $16 x ^ { 2 } y ^ { 2 } - 15 y ^ { 4 }$
D) $63 x ^ { 4 } y ^ { 4 } + 50 y ^ { 8 }$

Question

Quizplus · Accepted Answer

When adding polynomials, you combine like terms. Here, $9x^2y^2 + 7x^2y^2 = 16x^2y^2$ and $10y^4 + 5y^4 = 15y^4$, resulting in $16x^2y^2 + 15y^4$.

Add or Subtract as Indicated (9x2y2+10y4)+(7x2y2+5y4)\left( 9 x ^ { 2 } y ^ { 2 } + 10 y ^ { 4 } \right) + \left( 7 x ^ { 2 } y ^ { 2 } + 5 y ^ { 4 } \right)(9x2y2+10y4)+(7x2y2+5y4)

Add or Subtract as Indicated $\left( 9 x ^ { 2 } y ^ { 2 } + 10 y ^ { 4 } \right) + \left( 7 x ^ { 2 } y ^ { 2 } + 5 y ^ { 4 } \right)$