5√(3*25)+2√(9*3)-0,25√(16*3)-9√3=25√3+6√3-√3-9√3=31√3-10√3=21√3
![\left \{ {{x^{2}+6x-27\leq0} \atop {x+4<0}} \right.\\\\\left \{ {{(x+9)(x-3)\leq 0} \atop {x<-4}} \right.](https://tex.z-dn.net/?f=%5Cleft%20%5C%7B%20%7B%7Bx%5E%7B2%7D%2B6x-27%5Cleq0%7D%20%5Catop%20%7Bx%2B4%3C0%7D%7D%20%5Cright.%5C%5C%5C%5C%5Cleft%20%5C%7B%20%7B%7B%28x%2B9%29%28x-3%29%5Cleq%200%7D%20%5Catop%20%7Bx%3C-4%7D%7D%20%5Cright.)
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1) _________[- 9]_________[3]_________
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2) _______________(- 4)_____________
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x ∈ [-9 ; - 4)
- 9 + (- 8 ) + (- 7 ) + (- 6 ) + (- 5 ) = - 35
Ответ : - 35
23/4+21/5=5.75+4.2=9.95*16=159.2
Ответ:
3/10 * ( 12a + 9b - 10a - 18b) = 3/10 * ( 2a - 9b )
3/10 * ( 2 * 1 - 9 * (-4) ) = 3/10 * 38 = 0,6 * 19 = 11,4
2c + 7c^2 = 2c (1 + 3.5c)