Math problems in the first semester! Please! Urgent! - Training Enrollment Network

Math problems in the first semester! Please! Urgent!

( 1) A？ +A？ 1= (0 of a+65438+a)? -2 can be replaced, right? Similar:

A quartic+1=(A? +A？ 1)? - 2

Do you know those eight times? This problem is the application of the complete square formula.

(2) a? +B？ =(A—B)？ +2×A×B, substitute it on yourself, and you will be skilled if you do more.

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