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12unicorn12
@12unicorn12
June 2022
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Упростить выражения : 1) (a-2)^2-a^2+4 при a=-1
2) a^2-(a+1)^2+2a+5 при a=0.7
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93931
1) (a-2)^2-a^2+4 = a^2-4a+4-a^2+4 = 8-4a = 8-4*(-1) = 8+4 = 12.
2) a^2-(a+1)^2+2a+5 = a^2-a^2-2a-1+2a+5 = 4.
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12unicorn12
Спасибо вам оооогроменнное
93931
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Answers & Comments
2) a^2-(a+1)^2+2a+5 = a^2-a^2-2a-1+2a+5 = 4.