Question

find the walve Or8Xy (x + y ) if x+y=5 and x-y =1​

Answer 1

Answer:

x+y=5___□ , x-y=1____■

[■+□]

x+y=5

+x-y=1

______

2x =6 =》x=3

(put x=3 in ■)

3-y=1 =》-y = -2 =》y=2

put the value of y&x in 8xy (x+y)

8×3×2×(3+2)=48×5=240