Exercise 23

Simplify each expression, if possible, by combining like terms.

  1. \({z+8z^{2}+8z}\)

  2. \({-3z^{2}+7y^{2}}\)

  3. \({-9y-y-7t^{2}+s^{2}}\)

  4. \({3s^{2}+6y}\)

in-context