Tom's surf shop estimates that advertising costs for one month will be given by the polynomial 6x^2+7x. He estimates that utilities costs for one month is given by 2x-5. Find and simplify an expression that would estimate Tom's total costs for one month.

Question

anonymous · Answer

this is what i got; (6x^2+7x)+2x-5=
6x^2+7x+2x-5=
36x+9x-5=
45x+-5
can someone tell me if this is correct ?

turingtest · Answer

the $x^2$ term cannot be combined with the x term
also $6x^2$ is not the same as $(6x)^2=36x^2$

turingtest · Answer

so it is correct up to
$$6x^2+7x+2x-5=...$$

anonymous · Answer

ok so now i can combine like terms, so 7x+2x=9x

anonymous · Answer

6x^2=36x

anonymous · Answer

oh 12x instead of 36x