4х^2 = 19 ---> х^2 = 19/4
х = ±V19 / 2
10x^3+5x^2=5x^2(2x+1)
Ab^2+a^2b^3=ab^2(1+b)
8a^4-12a^2=4a^2(2a^2-3)
m^2b^3+mb^2=mb^2(mb+1)
3m^2+6m^3=3m^2(1+2m)
3ab^2+6ba^2=3ab(b+2a)
15y^3-5y=5y(3y^2-1)
18ab^2-9b^4=9b^2(2a-b^2)
65
1) = 5х⁷ 4) = -12n⁵x
2) = 3abm 5) = 9a⁷b³c
3) = -24xyz 6) = -x³y¹³
66
1) = 3ˣ(-2)³=3ˣ(-8)= - 24
2) = -4,5ˣ1/9ˣ(-4)² = -0,5ˣ16= -8
3) = 7/12ˣ(-1/7)ˣ(-2)² = -1/12ˣ4= -1/3
4) = 0,4ˣ(0,5)²ˣ6ˣ(-10)= 0,1ˣ6ˣ(-10)= -6
67
1) = -36p⁵k⁵ 4) = 0,9a⁵b⁷c¹⁸
2) = 2a³b⁴ 5) = -18x⁹y¹⁰z⁷
3) = 2,3x⁷y⁷ 6) = -4,5x⁶y⁴z¹⁰
<span>6х-7.2=0
6x=7.2
x=7.2/6=1.2
x=1.2</span>