(2x-9)'×(x-5)-(2x-9)×(x-5)'
___________________ =
(x-5)до квадрата
= (2)×(x-5)-(2x-9)×(1)
________________
(x-5)до квадрата
МТ=ST=8
По теореме пифагора. ТR^2+MT^2=X^2
X^2=36+64=100
Х=10
Удачи!
1) НОК(3, 4) = 12. НОК(3, 7) = 21, НОК(3, 8) = 24, НОК(4, 7) = 28,
НОК(4, 9)=36, НОК(6, 7)=42, НОК(7, 8) = 56, НОК(7, 9) = 63, НОК(8, 9) = 72
2) НОД(3, 6) = 3, НОК(3, 6) = 6; НОД(3, 9) = 3, НОК(3, 9) = 9.
НОД(4, 8) = 4, НОК(4, 8) = 8.
3) НОД(3, 6) = 3, НОК(3, 6) = 6; НОД(3, 9) = 3, НОК(3, 9) = 9.
<span>НОД(4, 6) = 2, НОК(4, 6) = 12; НОД(4, 8) = 4, НОК(4, 8) = 8; </span>
<span>НОД(6, 8) = 2, НОК(6, 8) = 24; НОД(6, 9) = 3, НОК(6, 9) = 18;</span>
1) 1/2 + 6 3/7 = 7/14 + 6 6/14 = 6 13/14 - ОТВЕТ
2) 2/9 + 1 8/15 = 10/45 + 1 24/45 = 1 34/45 - ОТВЕТ
3) 7 1/12 + 6 = 13 1/12 - ОТВЕТ