(2q -3z)2 - 2 (2q - 3z) (q-3z) +(9 - 3z)?
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Answer:
=(2q)(2)+(−3z)(2)+−4q2+18qz+−18z2+9+−3z
=4q+−6z+−4q2+18qz+−18z2+9+−3z
=(−4q2)+(18qz)+(−18z2)+(4q)+(−6z+−3z)+(9)
=−4q2+18qz+−18z2+4q+−9z+9
Answer =−4q2+18qz−18z2+4q−9z+9
Step-by-step explanation:
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