Спрости вираз 1) (8a-3)(8a+3)-(7a+4)(8a+4); 2) 0.6m(2m-1)(2m+1)+0.3(6+5m)(6-5m); 3) (7-2x)(7+2x)-(x-8)(x+8)-(4-3x)(5+3x); -[tex]b^{2}[/tex]c(4b-[tex]c^{2}[/tex])(4b+[tex]c^{2}[/tex])+16[tex]b^{4}[/tex]c
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Объяснение:
(8a-3)(8a+3)-(7a+4)(8a+4)=64a²-9-(56a²+28a+32a+16)=64a²-9-56a²-28a-32a-16=9a²-25-60
0.6m(2m-1)(2m+1)+0.3(6+5m)(6-5m);=
0,6m(4m²-1)+0,3(36-25m²)=2,4m³-0,6m+1,08-7,5m²
Дальше так же делай