5,06-0,24=4,82дм(4дм,8см,2мм)
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1) (18a-3a²)/(8a²-48a)=3a(6-a)/8a(a-6)=3a(-1)(a-6)/8a(a-6)=-3/8
2) (8p-40)/(15-3p)=8(p-5)/3(5-p)=8(-1)(5-p)/3(5-p)=-8/3
3) (4-x²)/(10-5x)=(2-x)(2+x)/5(2-x)=(2+x)/5=2/5+x/5=0.4+0.2x
4) (3x+6y)²/(5x+10y)=9(x+2y)²/5(x+2y)=9(x+2y)/5=1.8(x+2y)=1.8x+3.6y
5) (ax+bx-ay-by)/(bx-by)=(x(a+b)-y(a+b))/b(x-y)=(a+b)(x-y)/b(x-y)=(a+b)/b=a/b+1
6) (a²-6a+9)/(27-a³)=(a-3)²/(3-a)(9+3a+a²)=(a-3)²/(-1)(a-3)(9+3a+a²)= =(3-a)/(9+3a+a²)
7) (2a-2b)²/(a-b)=4(a-b)²/(a-b)=4(a-b)=4a-4b
8) (4c+12d)²/(c+3d)=16(c+3d)²/(c+3d)=16(c+3d)=16c+48d
9) (4x²-y²)/(6x-3y)²=(2x-3y)(2x+3y)/9(2x-y)²=(2x+y)/9(2x-y)
10) (ab-3b-2a+6)/(15-5a)=(b(a-3)-2(a-3))/5(3-a)=(a-3)(b-2)/5(3-a)= =(a-3)(b-2)/5(-1)(a-3)=(2-b)/5
<span>-15a+20b-35c =-5*(3a-4b+7c)
</span>8a^3b^5-28a^4b^2=4a^3b^2(2b^3-7a)
9x^2y-12x^3y^2+3xy=3xy(3x-4x^2y+1)
1
[cos(π-b)-3sin(-3π/2+b)]/cos(b-3π)=[-cosb+sin(3π/2-b)]/cos(b-π)=
=[-cosb-cosb)/(-cosb)=-2cosb/(-cosb)=-2
3
24√2cos1035=24√2cos(720+315)=24√2cos315=24√2cos(360-45)=
=24√2cos45=24√2*1/√2=24
6
11sin49/sin311=11sin49/sin(360-49)=11sin49/(-sin49)=-11