Factorise this please?

(2x-5) (x+14)

Best way to do it is the two number taht arent X have to multiply to equal -70.

Best way to do this is draw a table, and look at two numbers that multiply to equal -70.

-5 and +14

But you get +23x in the equation so:

to get +23x you normally add the x values up so say if in the brackets you had

(x-5)(x+14)

You would get x^2 + 9x -70

But you need 2x^2 so you input the 2 in the first bracket like this:

(2x-5)x+14)

And if you mutiply out

Hey presto, you get

2x^2 +23x -70 ;)

(2x-5)(x+14)