Goi x,y la chieu dai, chieu rong cua bon hoa do
Ta co :2(x+y)=22 ( Chu vi bon hoa )
=>x+y=11
=>x=11-y
Ma : xy=24 ( dien tich bon hoa )
=> y(11-y)=24
=>11y-y2 =24 =>-11y+y2 =-24
=> -3y-8y+y2 +24=0
=>y(y-3)-8(y-3)=0
=>(y-3)(y-8)=0
=>TH1:y-3=0 =>y=3
Th2 :y-8=0 =>y=8
CMTT voi y=x-11 ta duoc :
x=3,x=8
Ma ta goi x la chieu dai, y la chieu rong
=> Chieu dai bon hoa la 8m,chieu rong bon hoa la 3m