Find the sum or difference.
-$( x + 4 ) ( 5 x - 5 )$
A) $5 x ^ { 2 } + 13 x - 20$
B) $5 x ^ { 2 } - 20 x + 15$
C) $5 x ^ { 2 } + 15 x - 20$
D) $5 x ^ { 2 } + 15 x + 15$

Question

Quizplus · Accepted Answer

To find the product of $( x + 4 ) ( 5 x - 5 )$, distribute each term in the first parenthesis with each term in the second parenthesis: $x * 5x = 5x^2$, $x * -5 = -5x$, $4 * 5x = 20x$, and $4 * -5 = -20$. Adding these together gives $5x^2 + 15x - 20$.

Find the Sum or Difference (x+4)(5x−5)( x + 4 ) ( 5 x - 5 )(x+4)(5x−5)

Find the Sum or Difference $( x + 4 ) ( 5 x - 5 )$