1)3x-3y+ax-ay=3(x-y)+a(x-y)=(x-y)(3+a)
2)ac+cb-6a-6b=c(a+b)-6(a+b)=(a+b)(c-6)
3)2ax-2bx-a²+ab+11a+24=2x(a-b)-a(a-b)+(11+24a)=(a-b) (2x-a)+(11+24a)
2/tgx-3tgx+5=0
3tg²x-5tgx-2=0,tgx≠0
tgx=a
3a²-5a-2=0
D=25+24=49
a1=(5-7)/6=-1/3⇒yga=-1/3⇒a=-arctg1/3+πn,n∈z
a2=(5+7)/6=2⇒tga=2⇒a=arctg2+πn,n∈z
|a| = √ 3^2+0^2+(-4)^2 = 5
<span>(5х+у)(у-5х) = у вквадрате - 25х вквадрате</span>