Match the expressions with the correct LCM 14x3, 15 y z3, & 12y3
here are the answer choices 420x3y3 z3 70x2 y2 12x2 y2 x2 + 6x + 8 x2 - 9 42xy3 z
ignoring the unknowns in your expression, do you know how to get the LCM of numbers
no
@arch1 @myko
420x3y3 z3
thank you :)
wat about 10x2 , 35x2 y2 ? @myko
ignoring the unknowns in your expression, do you know how to get the LCM of numbers?
no but that nots the right answer
hmm..... that's the right quaestion
yes and i gave you the answer choices ^^
is it 70x^2y^2
i mean that you should learn how to do it, so don't need somebody to just give you answers to same type of questions again and again
if you whant i explain you...
yes please
you got two numbers 10 and 35. Put them in prime factor form: 10 = 2*5 35= 7*5 so there are 2,5,7 prime factors involved. To find the LCD multiplie all commun factors. In this case there is just one lonly 5. So LCD =5. To find LCM multiplie all factors comun and not commun. So LCM=2*5*7 = 70 What for x^2y^2 just multiply all uknowns, becouse LCM have to have all of them. So the answer will be : 70x^2y^2
got it?
hmmm i actually understand that a lot!
ohk let me see if i can do this one alone and i will tell you my answer x -3 , & x2 - 9
k
i got 27 but tht is not an answer choice
just one little addon on my explanation. Might happen that the prime factor form of a nummber is: \[24=2^{3}*3\] so where i said: "To find LCM multiplie all factors comun and not commun" should better say: multiply all factors commun and not commun taken with their highest exponents.
x -3 , & x2 - 9 is bit different. x2 - 9=(x-3)(x+3) think of (x-3), (x+3) like being prime factors of a simple nummber. The rest is same
x-3=x-3 x2 - 9=(x-3)(x+3) so factors involved are (x-3) and (x+3) LCM rule says, multiply them, so (x-3)(x+3)=x2 - 9 is LCM
so its the same thing? x^2-9?
yes
yay!!
i think you got it, :)
yes i do!
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