Multiply.
-$$( x + 1 ) ( x - 1 ) ( 4 x + 3 )$$
A) $4 x ^ { 3 } + 3 x ^ { 2 } - 4 x - 3$
B) $4 x ^ { 3 } + 3 x ^ { 2 } + 4 x + 3$
C) $4 x ^ { 3 } - 5 x ^ { 2 } - 2 x + 3$
D) $4 x ^ { 3 } + 11 x ^ { 2 } + 10 x + 3$

Question

Quizplus · Accepted Answer

First, multiply the first two terms using the difference of squares formula: $(x + 1)(x - 1) = x^2 - 1$. Then, multiply the result by the third term: $(x^2 - 1)(4x + 3)$, which simplifies to $4x^3 + 3x^2 - 4x - 3$.

Multiply - (x+1)(x−1)(4x+3)( x + 1 ) ( x - 1 ) ( 4 x + 3 )(x+1)(x−1)(4x+3)

Multiply
- $( x + 1 ) ( x - 1 ) ( 4 x + 3 )$