Answer:
(B). roots
Explanation:
(a ± b)² = a² ± 2ab + b²
~~~~~~~~
( - )² = ( )²
( )² - 2 + ( )² = ( )²
4x + 5 - 2 + x - 1 = x + 4
2 = 4x + 5 + x - 1 - x - 4
= 2x
( )² = ( 2x )²
( 4x + 5 )( x - 1 ) = 4x²
4x² + x - 5 = 4x² ⇒ x = 5
9.4m questions
12.2m answers
- 
)² = ( 
)² )² - 2
+ ( )² = ( )² + x - 1 = x + 4 = 4x + 5 + x - 1 - x - 4 = 2x )² = ( 2x )²