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5X15=75 because 5X10=50 then 5X5 =25 75
1x75 3x25 5x15
(510)+(55)
Geometric mean of 5 and 15= √(5x15)=√75=5√3
The opposite of expand is contract (in some uses, to shrink).For expand (increase), the opposite can be reduce or decrease.For expand (widen), the opposite would be to narrow.For expand (inflate) the opposite would be to deflate.