Question

If (x+y)=7 and xy= 4,Find the value of x² + y².

Answer 1

Step-by-step explanation:

answer= 41

explanation-

(x+y)2= x2+y2+2xy

substituting (x+y) with 7 and xy with 4

(7)2 = x2+y2+2*4

49+x2+y2+8

x2+y2=49-8

x2+y2=41