Abcda'b'c 'regular triangular pyramid trunk ab = 20 cm a'b' = 8 cm aa '= 10. pyramid trunk apothem length =?
1- someone?
2-does someone speak romanian? (not needed to answer)

Look, when you want to do something like put it like x^2. x2 could mean x² or x₂. so to clear confusion, know the notation. to find the product multiply the x's and you get -8x and the y's and you get 6y. since it's all being multiplied it is just -8x6y, or answer a. although the better answer is -48xy(combining -8 and 6) because you should multiply constants whenever you can.