Question

given that x-y=12 and xy=13 find the value of (x + y)^2.​

Answer 1

Answer:

13-1=12

13*1=13

(13+1)*(13+1)=14*14=196

Answer 2

Answer:

1. (x-y)^2 = x^2+y^2-2xy
2. 144 =x^2+y^2-26
3. (x^2+y^2) = 170........(1)
4. now, (x+y)^2 = x^2+y^2+2xy
5. (x+y)^2 = 170+ 26= 196
6. (x+y)^2 = 196
7. and , x+y = 14 ans✓