S(3eˇx-4cosx+3xˇ2-4x+2)dx=3eˇx-4sinx+3.xˇ3/3-4.xˇ2/2+2x+c=
=3.eˇx -4.sinx +xˇ3-2.xˇ2+2x+c
Seˇxdx=eˇx (+c),Scosx dx = sinx (+c),Sk.dx =k.x (+c),
(x+2)(y-3)=5
xy-3x+2y-6=5
xy-3x+2y=5+6
7√¹/₂ и ¹/₂√20
7√¹/₂ = √(7² ·¹/₂) = √⁴⁹/₂ = √24,5
¹/₂√20 = √(¹/₂)²· 20) = √²⁰/₄ = √5
√24,5 > √5 => 7√¹/₂ > ¹/₂√20
1) 3ax=12-x
x=-9
3a*(-9)=12-(-9)
-27a=12+9
-27a=21
a=-21/27
a=-7/9
Ответ: -7/9
2) (5а+2) х =8-2а
х=2
(5a+2)*2=8-2a
10a+4=8-2a
10a+2a=8-4
12a=4
a=4/12
a=1/3
Ответ: 1/3
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