Question

x2 + y2 = 25
y − x = 7

Answer 1

Solving?

Answer 2

yeah!

Answer 3

lol

Answer 4

solve for y in the second and plug it in.

Answer 5

i knw the ansur.

Answer 6

x+7 and then?

Answer 7

Yes, plug that in.
@uri finish this for me. I gtg.
And don't give the ansur xD

Answer 8

@wequess2 right...when you solve for 'y' in the 2nd...you get y = x + 7

Now you go back to your first equation

\[\large x^2 + y^2 = 25\]

And you now replace 'y' here with what you now know 'y' equals...

\[\large x^2 + (x + 7)^2 = 25\]

Now you simplify that....what is (x + 7)²?