Question

3n^2 -27n +78 splitting middle term​

Answer 1

Answer:

Let's rewrite this expression as: x2 -8x -9

The middle term needs to be split into two terms whose product is -9x2 while the sum remains -8x

x2 - 9x + 1x -9

= x(x - 9) + 1 (x - 9)

= (x - 9) (x + 1)