Question

-(a + b) 2 = a 2 + b 2 + 2ab.
- (a − b) 2 = a 2 + b 2 − 2ab.
- a 2 − b 2 = (a − b) (a + b)
- (x + a) (x + b) = x 2 + (a + b) x + ab.

Answer 1

Answer:

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