Question

14x2 (x + y - 2xy) for x = -1, y = 2

Answer 1

Answer:

ᵍⁱᵛᵉⁿ, ᵗʷᵒ ᵃᵈʲᵃᶜᵉⁿᵗ ˢⁱᵈᵉˢ ᵃʳᵉ

5

ˣ

2

+

2

ˣ

ʸ

−

13

,

2

ˣ

2

−

6

ˣ

ʸ

+

11

ᵗʰᵉʳᵉᶠᵒʳᵉ,

2

(

ˡ

+

ᵇ

)

=

2

(

5

ˣ

2

+

2

ˣ

ʸ

−

13

+

2

ˣ

2

−

6

ˣ

ʸ

+

11

)

=

2

(

7

ˣ

2

−

4

ˣ

ʸ

−

2

)

=

14

ˣ

2

−

8

ˣ

ʸ

−

4

Answer 2

Answer:

x+y =12 xy =14; x2+y2 =? using the identity (a+b)2 =a2+b2 +2ab (x+y)2 =x2 +y2 +2xy ...