Ответ:
Объяснение:
a)2^98-4=4(2^96-1)=4(8^32-1)=4(8^16-1)(8^16+1)=4(8^8-1)(8^8+1)(8^16+1)=4(8^4-1)(8^4+1)(8^8+1)(8^16+1)=4(8^2-1)(8^2+1)(8^4+1)(8^8+1)(8^16+1)=4(8-1)(8+1)(8^2+1)(8^4+1)(8^8+1)(8^16+1)=28(8+1)(8^2+1)(8^4+1)(8^8+1)(8^16+1)
b)x^2+4xy+22y^2-12y+7=(x+2y)^2+18y^2-12y+7=(x+2y)^2+(3y-2)^2+9y^2+3>=0
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Ответ:
Объяснение:
a)2^98-4=4(2^96-1)=4(8^32-1)=4(8^16-1)(8^16+1)=4(8^8-1)(8^8+1)(8^16+1)=4(8^4-1)(8^4+1)(8^8+1)(8^16+1)=4(8^2-1)(8^2+1)(8^4+1)(8^8+1)(8^16+1)=4(8-1)(8+1)(8^2+1)(8^4+1)(8^8+1)(8^16+1)=28(8+1)(8^2+1)(8^4+1)(8^8+1)(8^16+1)
b)x^2+4xy+22y^2-12y+7=(x+2y)^2+18y^2-12y+7=(x+2y)^2+(3y-2)^2+9y^2+3>=0