А) 81а4-1=(3a-1)2( сверху)*(3a+1)2(сверхуб)y2-(x2+6x+9)=y2-(x+3)2
Ответ:
11*√84 *√4*√84=(√84*√84)* 11*2 =84*22=1848
Объяснение:
√84*√84= 84
√4=2
21*4 =84
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V65/11 * V52 * V55 = V(65*52*55)/11 = V(5*13*4*13*5*11)/11 = 5*13*2 = 130
Ответ. 130