Question

If x+y = 6 and X*Y = 4 find the value of x power2 + y power2

Answer 1

ANSWER-

x+y=6___________(1)

(x)(y)=4__________(2)

To find-

x²+y²

We know-

(x+y)²= x²+2xy+y²

Therefore,

x²+y²= (x+y)² -2xy

from equation 1 and 2.

x²+y²= (6)²-2(4)

x²+y²=36-8

x²+y²=28

the value is 28!!