Question

(4x^3 - 5x^2 + 3) - (6x^3 + 2x^2 - x) Which of the following expressions is equivalent to the expression above?

A) -10x^3- 3x^2+ x + 3
B)-2x^3- 7x^2+ x + 3
C)-2x^3- 3x^2 + x + 3
D) 10x^3-7x^2 - X + 3​

Answer 1

c

Explanation

Factoring: 2x3-5x2+7x-6

Thoughtfully split the expression at hand into groups, each group having two terms :

Group 1: 7x-6

Group 2: 2x3-5x2

so its c

Pull out from each group separately :

Group 1: (7x-6) • (1)

Group 2: (2x-5) • (x2)

Bad news !! Factoring by pulling out fails :

The groups have no common factor and can not be added up to form a multiplication.