SOLUTION: (a + b)^2 = 25; (a - b)^2 = 45, then a^2 + b^2 = ?

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Question 307174: (a + b)^2 = 25; (a - b)^2 = 45, then a^2 + b^2 = ?
Found 2 solutions by Fombitz, solver91311:
Answer by Fombitz(32388) About Me  (Show Source):
Answer by solver91311(24713) About Me  (Show Source):
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So

Eq. 1:

Then



So

Eq. 2:

Add Eq. 1 to Eq. 2:





John