(Z1-Z2)2=Z1 2-2Z 1 Z2+2Z 2
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Answer:
z1z2=z2z1
Step-by-step explanation:
We have,
(z1 + z2)^2 = (z, + z2)(z1 + z2) = (z1 + z2)z1 + (z1 + z2)z2 (by distributive law)
= z21 + z2z1 +z1z2 + z2 (by distributive law)
= z21 + 2z1z2 + z22
∵ z1z2 = z2z1
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