Y2 + x2 = 53
y − x = 5
y = 5 + x
(5+x)^2 + x^2 = 53
(5+x)(5+x) + x^2 = 53
25 + 10x + x^2 +x^2 = 53
2x^2 + 10x - 28 = 0
(x-2)(x+7)=0
x = 2 , x = - 7
y = 5 + 2
y = 7
y = 5 +(-7)
y = 5 - 7
y = - 2
The answer for the first one is 4 the sacend one is 49/2 the thirst one is 33223
I am not to sure but I would go for B. identity.
Answer:
2 option I think, if I'm wrong so sorry ;(
Step-by-step explanation: