Question

X2+y2=14 and xy=5 find (1/2x+1/2y)2

Answer 1

Answer:

4.9

Step-by-step explanation:

X^2+y^2=14

xy=5

(x+y)^2=(x+y)^2

x^2+y^2+2xy=(x+y)^2

x^2+y^2+2×5=(x+y)^2

x^2+y^2+10=(x+y)^2

(x+y)^2=14+10

(x+y)^2=24

(x+y)=4.9

R.H.S

1/2(x+y)2

(x+y)