4x^3+x^2-12x-3=0 factor by grouping

Step-by-step explanation:

observe

4x³ + x² – 12x – 3 = 0

4x³ – 12x + x² – 3 = 0

4x(x² – 3) + x² – 3 = 0

(4x + 1)(x² – 3) = 0

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer

215.92 dollars is the answer