Question
10. Which expression is equivalent to 4x+(x-4)^2-2x^2-1 ? A -x^2-4x-17 B -x^2-4x+15 -x^2+4x-17 D -x^2+4x+15
Answer
3.7
(249 Votes)
Heath
Master · Tutor for 5 years
Answer
First, expand the square in the given expression:\(4x + (x-4)^2 - 2x^2 - 1 = 4x + (x^2 - 8x + 16) - 2x^2 - 1\)Then, simplify the expression by combining like terms:=
=
So, the equivalent expression is
, which corresponds to option B.