SOLUTION: How do I solve this? 12m^3-4m^2 = 27m-9, my teacher said that since it is to the 3rd power I need three answers
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Question 548757: How do I solve this? 12m^3-4m^2 = 27m-9, my teacher said that since it is to the 3rd power I need three answers
Answer by Hsj7339(2) (Show Source): You can put this solution on YOUR website!
Hi, i'm a sophomore and I recently just went over this section.
First step is to subtract 27m and add 9 to both sides of the equation.
Now you group them and root out the greatest common factor from both groups as so and a note, the two other problems in parentheses have to be the same. In this problem those two are (3m-1)
now, you have to combine the two group and 4m^2 -9 as so.
now, you can factor 4m^2-9 again for your other solutions. You can plug in 0x to put it in form. Or you can plug it into quadratic formula. I am going to plug it into quadratic formula. being A, 0 being B, and -9 being C.
Now,simplify the quadratic formula to get 2 of your solutions.
So your 3 solutions would be , , and , (the one third from (3m-1)).
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