Question

no usless answer plz I need answer in 4 min​

Answer 1

So ur ans is 20

hope this helps u army

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Answer 2

Answer:

Answer is 20

Step-by-step explanation:

(a+b+c)^2 = a^2 + b^2 + c^2 + 2(ab+bc+ca)

let, ab+bc+ca = x

121 = 81 +2(x)

2x = 40

x= 20

Hope u find it useful✌️