A^2 ( a^2 -169) = a^2 (a-13)(a+13)
c (c^2 - 8c + 16) = c( c-4)^2
A) 2a²+3a-5b+7ab-2a-a+4b-5ab-a²-2ab=a²+0-b+0= a²-b
б) 2a(3a+4b)-5b(a+b)-5a²-3ab+6b²= 6a²+8ab-5ab-5b²-5a²-3ab+6b²= a²+b²
[√(4x + 60)]^2 =(12*7)^2
4x + 60 = 7056
4x = 7056 - 60
4x = 6996
x = 1749
((11a-b)/(96a^2*b^2))*((48a^3b^3)/(121a^2-b^2))= (11a-b)* (48a^3b^3)
-----------------------------------------=
(96a^2*b^2)* (121a^2-b^2)
=аb
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22a+2b