Question

if a²- b²=3, ab=3 find a+b​

Answer 1

Step-by-step explanation:

${a}^{2} + {b}^{2} = 3 \\ or \: {(a + b)}^{2} - 2ab = 3 \\ or \: {(a + b)}^{2} = 3 + 6 \: \: \: (as \: ab = 3) \\ \: (a + b) = 3$

Answer 2

+3 or -3

±3

Step-by-step explanation:

Given,

a²-b²=3 and ab=3

Find   a+b

Solution,

(a+b)²-2×ab=a²-b²

(a+b)²=a²-b²+2 ×ab

         =3+2×3

         =9

(a+b)²=9

a+b=√9

a+b=±3

a+b=3

or

a+b=-3