Question

if you don't know the answer please don't give if you know the answer please give the answer please plz plz ​

Answer 1

Answer:

I can't understand. Please text.

Answer 2

Answer:

58

Step-by-step explanation:

Given, 3x−7y=10  and xy=−1.

Squaring on both sides

(3x−7y)2=102.

We know, (a−b)2=a2−2ab+b2.

Then,

⟹(3x)2+(7y)2−2(3x)(7y)=100

⟹9x2+49y2−42xy=100

⟹9x2+49y2=100−42=58.