Can someone simplify this and also tell me how they did it? (6x^2 - 5) - (3x^2 + x + 7)

Question

Can someone simplify this and also tell me how they did it?  (6x^2 - 5) - (3x^2 + x + 7)

anonymous · Answer

what does - (3x^2 + x + 7)=
 - 3x^2 - x - 7
you saw how i distributed the negative sign?

anonymous · Answer

yea

anonymous · Answer

(6x^2 - 5) - (3x^2 + x + 7)=
(6x^2 - 5) - 3x^2 - x - 7         : i just replaced it back
6x^2 - 5 - 3x^2 - x - 7           : I took down the first parentheses because I'm not multiplying anything out

anonymous · Answer

add subtract to simplify

anonymous · Answer

so wahst the final product?

anonymous · Answer

6x^2 - 3x^2 - 5 - 7 - x 
add/subtract like terms.

anonymous · Answer

(6x^2 - 5) (-3x^2 - x - 7) i got it to that but what do i do with the x that has no exponent when i combine like terms since it has none?

precal · Answer

last step is 
$$3x^2-x-12$$

anonymous · Answer

you leave it out because it donesn't have a like term.