2)= a-b and a^3-a^2b
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Let the mean proportional between a–b and a
3
–a
2
b be x
a–b,x,a
3
–a
2
b are in continued proportion
a–b,x=x:a
3
–a
2
b
x∗x=(a–b)(a
3
–a
2
b)
x
2
=(a–b)a
2
(a–b)=[a(a–b)]
2
x=a(a–b)
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