Ответ:
Объяснение:
25a(a+3)-(5a-1)²= 25a²+75a-25a²+10a-1= 85a-1
9(p-3)²-(3p-1)(3p+1)= 9(p²-6p+9)-(9p²-1)= 9p²-54p+81-9p²+1= 82-54p
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Ответ:
Объяснение:
25a(a+3)-(5a-1)²= 25a²+75a-25a²+10a-1= 85a-1
9(p-3)²-(3p-1)(3p+1)= 9(p²-6p+9)-(9p²-1)= 9p²-54p+81-9p²+1= 82-54p