Question

x+y= -14

and, xy =84


find x²+y² ​

Answer 1

Answer:

28

Step-by-step explanation:

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

=(-14)^2-2(84)

=196-168

=28

Hope it helps..

Please mark it brainliest..

Follow me!

Answer 2

$\huge\boxed{ \mathfrak \red{Solution:-}}$

x+y= -14

xy=84

Using the identity,

(x+y)²=x²+2xy+y²

Now, by putting the values of x+y= -14 and xy=84,we get:-

(-14)²=x²+y²+2(xy)

⟹196=x²+y²+2×84

⟹196=x²+y²+168

⟹x²+y²= 196-168

$\huge\boxed{ \pink{ \bold{x {}^{2} + y {}^{2} = 28}}}$