Question

Нужна помощь!!!!!!!!!!!!!! ​

Answer 1

(х-5)(х+5)=х²-25

(7с+3)(7с-3)=49с²-9

m²-64=(m-8)(m+8)

25a²-9=(5a+3)(5a-3)

49x²-16y²=(7х+4у)(7х-4у)

0,09z²-25c²=(0.3z+5c)(0.3z-5c)

(25²-23²)/(35²-29²)=(25+23)(25-23)/(35-29)(35+29)=48*2/6*64=96/384= =0.25