What is the simplified form of this expression? (-x2 + x) + (4x2 − x − 1) A. -3x2 + 1 B. 5x2 + 2x − 1 C. 3x2 − 1 D. -5x2 + 2x + 1

The simplified form of this expression (- + ) + (4 − − 1) is 3 − 1.

Step-by-step explanation:

First step for simplifying the equation is to put all the variables with same degree of power at one place:So,                         - + 4 + - - 1                                                                                            

                                   =   3 − 1.

We performed the addition and subtraction of the variable's coefficient with same order of power i.e (-1+4) +(1-1) -1.Finally the equation in the questions is reduced to simpler form as     3-1. The easy method to check is, assign any number to value of (say =2) in question. Now the option that gives the same value as question is our answer.

25 inches - 0.694 yards

B. because the 7 represents "seven times", x represents "a number", 12 represents "plus twelve", and -4 represents "minus four"