Page 29 - E booklet prep 3 bader 2025 b_Neat

Example 2:

Find the middle proportion between 4???? and 25????
Middle = ±v?????? ?? ???????? = ±???? ?? ??

Example 3:

If b is the middle proportion between a and c , prove that :
???? + ???? ??
???? + ???? = ??

b = cm , a = c ????

LHS = ????????+???????? = ????????( ????+?? ) = ????
????????+ ???? ???? (????+ ??)

RHS = ???????? = ????
????

LHS = ??????

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