trig
posted by j. .
simplify (3x^25x+4)(5x^2+7x7)

Combine similar terms. For example, the two "x^2" terms combine to give
3x^2 5x^2 = 2x^2
You can also combine the two 'x' terms, to get one 'x' term and the two constants also.
Don't forget that the "" in front of
(5x^2+7x7) changes the sign of every term inside the parentheses, before you combine similar terms.
You should end up with
2x^2 12x +11