A=6..... B=4... C=2.......
2х^2 – 2х – 12 = (х + 2)^2
2(х^2 – х – 6) = (х + 2)^2
2(х^2 + 2х – 3х – 6) = (х + 2)^2
2(х • (х + 2) – 3(х + 2)) = (х + 2)^2
2(х – 3) • (х + 2) = (х + 2)^2
2(х – 3) • (х + 2) – (х + 2)^2 = 0
(х + 2) • (2(х – 3) – (х + 2)) = 0
(х + 2) • (2х – 6 – х – 2) = 0
(х + 2) • (х – 8) = 0
х + 2 = 0
х – 8 = 0
х = – 2
х = 8
B6=b1*g^5;
b3=b1*g^2;
b6 : b3=(b1*g^5) / (b1*g^2) =g^3;
g^3= - 5 / -40 ;
g^3= 1/8 ;
g^3 = (1/2)^3 ;
g= 1/2
4x-1:4x+3=2
4x:4x=2+1-3
1x=0
x=1:0
x=0
вроде так