Multiply.
-$\left( 5 x ^ { 2 } + 5 y \right) \left( 4 x ^ { 2 } - 8 y \right)$
A) $20 x ^ { 4 } - 20 x ^ { 2 } y - 40 y ^ { 2 }$
B) $20 x ^ { 2 } - 20 x y - 40 y ^ { 2 }$
C) $20 x ^ { 4 } - 20 x ^ { 2 } y ^ { 2 } - 40 y ^ { 2 }$
D) $20 x ^ { 4 } - 20 x ^ { 2 } y - 40 y ^ { 4 }$

Question

Quizplus · Accepted Answer

To multiply the given expressions, apply the distributive property (FOIL method): $ (5x^2 + 5y)(4x^2 - 8y) = 20x^4 - 40x^2y + 20x^2y - 40y^2 = 20x^4 - 20x^2y - 40y^2 $.

Multiply - (5x2+5y)(4x2−8y)\left( 5 x ^ { 2 } + 5 y \right) \left( 4 x ^ { 2 } - 8 y \right)(5x2+5y)(4x2−8y)

Multiply
- $\left( 5 x ^ { 2 } + 5 y \right) \left( 4 x ^ { 2 } - 8 y \right)$