yang baik hati nya dan yg gk smbong blh bantu aku

Luas = 12 m²
x . 2y = 12
xy = 6
y = 6/x

3x + 4y = 3x + 4(6/x)
= 3x + 24x^-1
Turunkan dan hasilnya = 0 (titik stasioner)
3 - 24x^-2 = 0
3 = 24/x^2
3x^2 = 24
x^2 = 8
x = √8 = 2√2 m

y = 6/x = 6/(2√2) = 3/√2 . √2/√2 = (3/2) √2 m