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Verified answer
Bab Persamaan GarisMatematika SMP Kelas VIII
2x + 3y - 4 = 0
m1 = -x/y
= -2/3
2px + (p + 3)y + p = 0
m2 = -x/y
= -2p/(p + 3)
karena tegak lurus, maka
m1 . m2 = -1
(-2/3) . (-2p/(p + 3)) = -1
4p = (-1) . (3) . (p + 3)
4p = -3p - 9
4p + 3p = -9
p = -9/7