30z^(2)+7z-15

Simplify combining like terms: -z^(2) +13z^(2) - 5z + 7z^(3) -15z

Subtract : 3z^(2)-2z^(2)+7z -8 from 8-z-z^(2)

If z= -3 + sqrt2i , then prove that z^(4) + 5z^(3) + 8z^(2) + 7z + 4 is equal to -29

If z = 3- 5i then z^(2) - 10z + 30=

If z = 3 + 3i then, z^(2)+z+15 =

If z_(1)=3 + 4i,z_(2)= 8-15i , verify that |z_(1) + z_(2)|^(2) + |z_(1)-z_(2)|^(2)= 2(|z_(1)|^(2) + |z_(2)|^(2))

If z_(1)=3 + 4i,z_(2)= 8-15i , verify that |z_(2)-z_(1)| gt ||z_(2)|- |z_(1)||

If z_(1)=3 + 4i,z_(2)= 8-15i , verify that |z_(1) + z_(2)| lt |z_(1)| + |z_(2)|