-3t(1,2-4t)=0-3t 1,2 - 3t -4t = 0-3,6t + 12t^2 = 012t^2 - 3,6t = 03,6t(3,33t - 1) = 0t1 = 0t2 = 1/3,33
2+5b=05b = -2b = -2/5
4b2-1,6b=04b^2 - 1,6b = 00 = 4b(b - 0,4)b1 = 0, b2 = 0,4
0,4m2+4m=00,4m^2 + 4m = 00 = 0,4m(m + 10)m1 = 0, m2 = -10
6k2+0,36k=06k^2 + 0,36k = 00 = 0,36k(6k + 1)k1 = 0, k2 = -1/6
5x - 1/2x2 = 05x - 1/2x^2 = 00 = 1/2x^2 - 5x0 = 1 - 10x10x = 1x = 1/10
-3t(1,2-4t)=0
-3t 1,2 - 3t -4t = 0
-3,6t + 12t^2 = 0
12t^2 - 3,6t = 0
3,6t(3,33t - 1) = 0
t1 = 0
t2 = 1/3,33
2+5b=0
5b = -2
b = -2/5
4b2-1,6b=0
4b^2 - 1,6b = 0
0 = 4b(b - 0,4)
b1 = 0, b2 = 0,4
0,4m2+4m=0
0,4m^2 + 4m = 0
0 = 0,4m(m + 10)
m1 = 0, m2 = -10
6k2+0,36k=0
6k^2 + 0,36k = 0
0 = 0,36k(6k + 1)
k1 = 0, k2 = -1/6
5x - 1/2x2 = 0
5x - 1/2x^2 = 0
0 = 1/2x^2 - 5x
0 = 1 - 10x
10x = 1
x = 1/10