15a-25ab+9ab-15b
15a-16ab-15b
(5a+3b) (3a-5b)
15a²-25ab+9ab-15b²
15a²-16ab-15ab
Saludos :D
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15a-25ab+9ab-15b
15a-16ab-15b
(5a+3b) (3a-5b)
15a²-25ab+9ab-15b²
15a²-16ab-15ab
Saludos :D