Question Number 104640 by Anindita last updated on 22/Jul/20

1.  What is the brief word of LCM ?  2.  If x=3 and y=6 then what is the        answer of ((x^2 +2xy+y^2 )/(3x+5y×9xy)) ?  3.  If a∗b= ((a×b)/(a÷b)) then what is the        answer of 2∗3+7∗5−9∗6 ?  4.  What is the brief word of GCD ?        What is the GCD of 12,56,80 ?  5.  Solve that        [(1,6,7),(2,8,9),(3,(−3),(−6)) ]+ [(6,7,(12)),((−6),9,(45)),((−8),6,(−3)) ].

Answered by Rasheed.Sindhi last updated on 23/Jul/20

1. LCM stands for ′Least Common  Multiple ′.  2. ((x^2 +2xy+y^2 )/(3x+5y×9xy))=(((3)^2 +2(3)(6)+(6)^2 )/(3(3)+5(6)×9(3)(6)))             =((9+36+36)/(9+30×162))=((81)/(9+4860))           =((81)/(4869))=(9/(541))  3. 2∗3+7∗5−9∗6=((2×3)/(2÷3))+((7×5)/(7÷5))−((9×6)/(9÷6))  =(2×3)((3/2))+(7×5)((5/7))−(9×6)((6/9))  =(3)(3)+(5)(5)−(6)(6)=9+25−36         =−2  4.GCD stands for ′Greatest  Common Divisor′