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asnaseerBest ResponseYou've already chosen the best response.1
hint: Expand \((x+y)^2\)
 one year ago

samnathaBest ResponseYou've already chosen the best response.0
i'm sorry i'm still lost
 one year ago

asnaseerBest ResponseYou've already chosen the best response.1
what can you say about the number \((x+y)^2\)? can it ever be negative?
 one year ago

samnathaBest ResponseYou've already chosen the best response.0
well i thought anything squared would be true bit i can't get the two brackets the same as i can't get 3y squared
 one year ago

asnaseerBest ResponseYou've already chosen the best response.1
try and first expand \((x+y)^2\) and then see what else you need to add to this in order to get your original expression of \(x^2+2xy+3y^2\)
 one year ago

samnathaBest ResponseYou've already chosen the best response.0
so the answere would be (x+y)^2 + y^2
 one year ago

asnaseerBest ResponseYou've already chosen the best response.1
not quite  what do you get when you expand \((x+y)^2\) ?
 one year ago

asnaseerBest ResponseYou've already chosen the best response.1
correct  now what do you need to add to this in order to get to your original expression?
 one year ago

asnaseerBest ResponseYou've already chosen the best response.1
so we end up with:\[x^2+2xy+3y^2=(x+y)^2+2y^2\]now  can you see that this can never be negative?
 one year ago

samnathaBest ResponseYou've already chosen the best response.0
ok thanks while i have you i have to do this using the same axsis and scales graph the functions f(x)=x and g(x)= 2x  3
 one year ago

asnaseerBest ResponseYou've already chosen the best response.1
yw :) could you please post that as a separate question. thanks.
 one year ago

samnathaBest ResponseYou've already chosen the best response.0
using the same axsis and scales graph the functions f(x)=x and g(x)= 2x  3
 one year ago

asnaseerBest ResponseYou've already chosen the best response.1
< I meant post in the list to the left
 one year ago

asnaseerBest ResponseYou've already chosen the best response.1
np :) it just helps posting each question separately as others can then see each question more easily and also learn from them. :)
 one year ago
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