yg tau jwb pake cara ya.... no 3&4 bagaimna cranya?

3. [tex]A = \left[\begin{array}{cc}2&a + 2b\\11&10\\\end{array}\right] \\ B^{T} = \left[\begin{array}{ccc}a&-8\\11&b+5c\\\end{array}\right] [/tex]
a = 2                         2a - 2b + 2c
b = a+2b = -8           2(2) - 2(-5) + 2(3)
   = 2+2b = -8           4 - (-10) + 6
   = 2b = -10             4 + 10 + 6 = 20
   =  b  = -5
c = b+5c = 10
   = -5+5c = 10
   = 5c = 15
   = c = 3

4. [tex]A = \left[\begin{array}{ccc}2x&y - 2\\1&3\\\end{array}\right] \\ B^{T} = \left[\begin{array}{ccc}4&2\\1&3\\\end{array}\right] [/tex]
A = B^T
2x = 4
x = 2
y - 2 = 2
y = 4