Hey, I have a question, you can factor using guess and check or grouping, here it is
-13a + 12 - 4a^2
the answer is -(a+4)(4a-3)
Not sure how to get it using either one, please help! Thanks!
First re-arrange:
Now factor out the negative sign
Now we should take the term and factorise that, keeping in mind that it is not yet complete. (The and terms represent the constants)
Now we should see which constants give us a product of 12.
(1 x 12 ; 2 x 6 ; 3 x 4)
Now from those options we should find which also satisfies the middle term.
Can you take it from here? Just do it step by step.
and the answers in the back of the book for the problems you answered are a little different, thanks for helping me, i'm just confused!
2.) n^3-n^2+n-1
(n-1) (n^2 +1)
3.) 4a(a+2) - 8 (a+2)
4(a+2)(a-2)
4.) -6x^3 +10x^2 - 4x^4
-2x^2(2x+5)(x-1)
5.) a rectangle has area described by the polynomial 6x^2 + x -1 suare centimeters. Find the length and width of the rectangle.
2x-5