=>{3-2y(22-4y)16
{x=22-4y
3-2y(22-4y)=16.
3-44y+8y=16
-44y+8y=16-3
-36y=13
Y=13:(-36)
(sin3x*cosx-sinx*cos3x)()=0
(sin3x*cosx-sinx*cos3x)=sin 2x
sin2x=0
x=πN/2
5x-x²=0
x=0
x=5
x(5-x)>=0
==============0=========5==========
------------------------- +++++++ -----------
ОДЗ x=[0 5]
x=πN/2 N=0, 1 , 2 , 3
x=5
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2x(x-1) - 3(x-1) = (x-1)(2x-3)
ab + ac + 4b + 4c = a(b+c) + 4(b+c) = (b+c)(a+4)
8х+15у=162|•(-5)
5х-7у=3|•8
-40х+75у=-810
40х-56у=24
19у=-786
у=-786/19