Question

a²+b²=30 &a.b=3
then a+b=?​

Answer 1

Answer:

6

Step-by-step explanation:

(a+b)^2=a^2+b^2+2*a*b

(a+b)^2=30+2*3=30+6=36

a+b=6

Answer 2

Step-by-step explanation:

a square + b square is equals to 30

into b is equals to 3

using identity a plus b ka whole square

a square + b square is equals to2 a b

30*2(3)

=36

but it is the value of a plus b ka whole square

(a+b)^2=36

a+b=√36

a+b = 6

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