Plz answer first three question i will mark brainliest
Attachments:
shubham709963:
1st answer root 2
2nd answer. a^2+4b^2+9c^2+4ab+12bc+6ac
3rd answer. (2,5)
Answers
Answered by
0
2) (a + b + c)2 = a2 + b2 + c2 + 2ab + 2bc + 2ca
can solve the problem by this method
can solve the problem by this method
Answered by
2
1. rationalising factor of √18
we can write √18 = √(9×2) = 3√2
on multipling it by √2 we get a rational no. i.e. 6
hence the rationalising factor is √2
2. using (x+y+z)^2 = x^2 + y^2 + z^2 + 2(xy+yz+zx)
(a+2b+3c)^2 = a^2 + 4b^2 + 9c^2 + 2(2ab+6bc+3ac)
3. reflection of point (-2,5) across the origin is (2,-5)..
we can write √18 = √(9×2) = 3√2
on multipling it by √2 we get a rational no. i.e. 6
hence the rationalising factor is √2
2. using (x+y+z)^2 = x^2 + y^2 + z^2 + 2(xy+yz+zx)
(a+2b+3c)^2 = a^2 + 4b^2 + 9c^2 + 2(2ab+6bc+3ac)
3. reflection of point (-2,5) across the origin is (2,-5)..
thanks
Similar questions