Question

x=1;y=2 find the
value of x²+ 2xy_y2​

Answer 1

x²+2xy-y²

x*x +2×1×2-y*y

1×1+4-2×2

5+4-5

9-5

=4

Answer 2

Answer:

1 is the answer

Step-by-step explanation:

$x {}^{2} + 2xy - y {}^{2}$

$1 {}^{2} + 2(1)(2) - 2 {}^{2}$

$1 + 4 - 4$

$= 1$