(a-6)(a+6)(36+a²)-(a²-18)²=
(a²-36)(a²+36)-(a²-18)²=
(a⁴-36²)-a⁴+36a²-324=
36a²-1620=36*(-1/6)²-1620=-1619
1) a) b*(b3)4:b9= b1+3*4-9=b4
б)9x2y3-x2y3-10x2y3=-x2y3
в) (3x2y)4*(3xy3)2=54x8y4*6x2y6=328x10y10
г) ((c4)5*c8)/((c7)4)=(c20*c8)/(c28)=(c20+8)/(c28)=c28/c28=1
2) (21(12))/((7(4)3)*3(2))=(21(12))/(7(12)*3(2)=(21(12))/(21(14))=21(-2)
3)3/2(6)*2/3(5)=(3/2*2/3)(6+5)=6/6(11)=1(11)
3/2(6)*2/3(5)<125(0)
Y1=x^2
y2=x^2+4x
y3=x^2+4x-5
3y + 9/5 + 5y - 5/4 = 6 + 3y + 1/2
8y + 1,8 - 1,25 = 3y + 6,5
8y + 0,55 = 3y + 6,5
8y - 3y = 6,5 - 0,55
5y = 5,95
y = 5,95 ÷ 5
y = 1,19