p x l = l
p x (50 – p) = 400
50p – p2 = 400
p2 – 50 + 400 = 0
(p – 40) (p – 10) = 0
P – 40 = 0, p = 40
P – 10 = 0, p = 10
Panjang = 40 meter
Lebar = 50 – p
= 50 – 40 meter = 10 meter
p x l = l
p x (50 – p) = 400
50p – p2 = 400
p2 – 50 + 400 = 0
(p – 40) (p – 10) = 0
P – 40 = 0, p = 40
P – 10 = 0, p = 10
Panjang = 40 meter
Lebar = 50 – p
= 50 – 40 meter = 10 meter
Editor: Suci Annisa Caroline
Sumber: Buku Kemendikbud