Question

ab + ba = 154 và a - b = 2

Answer 1

a+b=14

a-b=2

tự tính

Answer 2

ab+ba=154

10a+b+10b+a=154

(10a+a)+(10b+b)=154

11a+11b=154

11(a+b)=154

a+b=154/11

a+b=14

=>a=(14+2)/2=8

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Answer 3

ab+ba=154

10a+b+10b+a=154

(10a+a)+(10b+b)=154

11a+11b=154

11(a+b)=154

a+b=154/11

a+b=14

=>a=(14+2)/2=8

=>b=8-2=6

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Answer 4

10a + b + 10b + a = 154 <=> 11 (a + b) = 154 => a + b = 14

a = (14 + 2) : 2 = 8

b = (14 - 2) : 2 = 6

=> ab = 86

Answer 5

ta có :

 10 a +b + 10 b +b = 154

11a +11b = 154

11( a+b ) = 154

a+b = 14

=> a = 8

b = 6

tick nha