Verified Answer :

Let T = the twins' ages
Then, the older sister is of age 2 + T.

the product of the three siblings ages is

TT(T+2)

the sum of their ages.

(T + T + (T + 2))

Using those equations and your calculator, you can now calculate the age of the siblings. 

I hope that helps you.

taskmasters

Age of twins = x
Age of older sister = x + 2

x x (x+2) = x + x + (x+2) + 4558

x² (x+2) = 3x + 4560
x³ + 2x² = 3x + 4560
x³ + 2x² - 3x - 4560

I tried fiddling with the calculator and came up with 16 and  18.

16 16 * 18 = 4608
16 + 16 + 18 = 50

4608 - 50 = 4558

The twins' age is 16.

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