если x=10, то y= 0,1 x +5=0,1* 10 +5= 1+5=6
если x= 50 ,то y=0,1x +5=0,1 *50+5=5+5=10
если x= 120, то y=0,1x+5=0,1*120+5=12+5=17
36 / ( 2<span>√6)² = 36 / 24 = 1,5</span>
![\frac{10}{25-b^{4}}+ \frac{1}{5+b^{2}} - \frac{1}{5-b^{2}} = \frac{10}{(5+b^{2})(5-b^{2})}+ \frac{1}{5+b^{2}} - \frac{1}{5-b^{2}} = \\ =\frac{10}{(5+b^{2})(5-b^{2})}+ \frac{5-b^{2}}{(5+b^{2})(5-b^{2})} - \frac{5+b^{2}}{(5-b^{2})(5+b^{2})}= \frac{10+5-b^{2}-5-b^{2}}{(5+b^{2})(5-b^{2})} = \\ = \frac{10-2b^{2}}{(5+b^{2})(5-b^{2})} = \frac{2}{5+b^{2}}](https://tex.z-dn.net/?f=+%5Cfrac%7B10%7D%7B25-b%5E%7B4%7D%7D%2B+%5Cfrac%7B1%7D%7B5%2Bb%5E%7B2%7D%7D+-+%5Cfrac%7B1%7D%7B5-b%5E%7B2%7D%7D+%3D+%5Cfrac%7B10%7D%7B%285%2Bb%5E%7B2%7D%29%285-b%5E%7B2%7D%29%7D%2B+%5Cfrac%7B1%7D%7B5%2Bb%5E%7B2%7D%7D+-+%5Cfrac%7B1%7D%7B5-b%5E%7B2%7D%7D+%3D+%5C%5C+%3D%5Cfrac%7B10%7D%7B%285%2Bb%5E%7B2%7D%29%285-b%5E%7B2%7D%29%7D%2B+%5Cfrac%7B5-b%5E%7B2%7D%7D%7B%285%2Bb%5E%7B2%7D%29%285-b%5E%7B2%7D%29%7D+-+%5Cfrac%7B5%2Bb%5E%7B2%7D%7D%7B%285-b%5E%7B2%7D%29%285%2Bb%5E%7B2%7D%29%7D%3D+%5Cfrac%7B10%2B5-b%5E%7B2%7D-5-b%5E%7B2%7D%7D%7B%285%2Bb%5E%7B2%7D%29%285-b%5E%7B2%7D%29%7D+%3D+%5C%5C+%3D++%5Cfrac%7B10-2b%5E%7B2%7D%7D%7B%285%2Bb%5E%7B2%7D%29%285-b%5E%7B2%7D%29%7D+%3D+%5Cfrac%7B2%7D%7B5%2Bb%5E%7B2%7D%7D)
Любое число в квадрате положительно, поэтому это выражение будет принимать только положительные значения.
934
а) 5(х - у)(х+у)
б) а(м-n)(m+n)
в) 2а(х² - у²) = 2а(х-у)(х+у)
г) 9( р- 1)
д) 4(4х²-1) = 4(2х-1)(2х+1)
е) 3(25-9с²) = 3(5-3с)(5+3с)
935
а) у(у²-у(в 4 степени)) = у(у-у²)(у+у²)
б) 2х(1 - 2х²)
в) х²( 81-х²) = х²(9-х)(9+х)
г)4у(у²-25у(в 4 степени)) = 4у(у-5у²)(у+5у²)
936
а) м(х-7)(х+7)
б) а(в-2с)(в+2с)
в) в(4в-1)
г) а(а-с)(а+с)