Y=1,1cm
X=8,8cm
Y=0,5cm
X=0,1cm
А)21х²-7х+3х-1-21х²=3
-4х=4
х=4:(-4)
х=-1
б)1-3х-4х+12х²=12х²-6х
1-3х-4х+12х²-12х²+6х=0
-х=-1
х=1
1)
2x²-3x=0
x(2x-3)=0
Либо :
х=0
х=1.5
2)
х²-2х-35=0
х=(2±√(4+140))/2
х=-5
х=7
Log2(6.4)+log2(5)=
=log2(6.4*5)=
=log2(32)=
=log2(2^5)=
=5