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hhomeschool24
31.07.2019 •
Mathematics
Find the product mentally. ( r - s )^ 2 2 r^2 - rs - s^2 r^2 - 2 rs + s^2 r^2 - rs + s^2
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Ответ:
Ответ:
let the first number be x, the second number will be x+1, the third number be x+2
thus the sum of the numbers will be:
x+(x+1)+(x+2)=-381
3x+3=-381
3x=-381-3
3x=-384
x=-128
thus the first number is -128, the second number is -127 and the third number is -126