Question

-7 is one of the factors of x^2 - 9x + 14 yes?


when factoring x^2 - 5x - 14 the 5x how would it be written ??

Answer 1

#1
substitute -7 in the equation, and see if it reduces to zero. if yes, then yes its a factor.

#2
\[x^2 +7x -2x - 14\]
\[= x(x+7) -2(x+7)\]

i am sure you can follow up with the rest.

Answer 2

Using the criss cross method.