6. Subtract the following expressions columnwise. (a) a2 + b2 from a2 - b2 + a2b2 a a
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Answer:
2b2-2a2
Step-by-step explanation
b2-a2+(-a2+b2)=b2-a2-a2+b2
=(1+1)b2+(-1-1)a2
=2b2-2a2
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