Select the correct difference. -3z^7 - (-5z^7)
rememberx-(-y) means x+y since minusing a negative cancels-3z^7+5z^7addthe coeficientsone way to show is undistribute-3z^7+5z^7=(z^7)(-3+5)=(z^7)(2)=2z^7answer is 2z^7