Question

how to simplify
(x-3)-(x+1)(2x+5)

Answer 1

this is just an expression ?

Answer 2

expand (x+1)(2x+5) using product rule of polynomials

Answer 3

x-3-2x^2-2x-5x-5
=-(2x^2+6x+8)
=-2(x^2+3x+4)

Answer 4

By F.O.I.L (First Outer Inner Last) we can expand:
\[(x+1)(2x+5) = 2x^2+5x+2x+5=2x^2+7x+5\]

Then we've got:
\[(x-3)-(2x^2+7x+5)=(2x^2+6x+2)\]

...man, I am super rusty. I still for some reason think I've done something wrong!

Answer 5

yeah ur wrong..this is the correct answer... -2x^2+8x+2

Answer 6

Well now we've got three answers...lets try to come to agreement (not that I claim I am certainly correct...attempting again!

Answer 7

dat's 5n.