D在y = kx - 2上: -4 = -3k/2 - 2, k = 4/3
a = 3k - 2 = 2, A(3, 2)
m = 3*2 = 6
y = 4x/3 - 2
y = 0, x = 3/2, B(3/2, 0)
x = 0, y = -2, C(0, -2)
AC = 5
一个解为CP = 5, P(0, 3)
CP上的高为A的横坐标h = 3, S = CP*h = 5*3 = 15
D在y = kx - 2上: -4 = -3k/2 - 2, k = 4/3
a = 3k - 2 = 2, A(3, 2)
m = 3*2 = 6
y = 4x/3 - 2
y = 0, x = 3/2, B(3/2, 0)
x = 0, y = -2, C(0, -2)
AC = 5
一个解为CP = 5, P(0, 3)
CP上的高为A的横坐标h = 3, S = CP*h = 5*3 = 15