How can i do this???

a rectangle is 8 feet ling and 6 feet wide. if each side is increased by the same amount, the area of the new rectangle is 72 square feet more than the area of the original rectangle . find the length and width of the new rectangle in feet..

Question

How can i do this???

a rectangle is 8 feet ling and 6 feet wide. if each side is increased by the same amount, the area of the new rectangle is 72 square feet more than the area of the original rectangle . find the length and width of the new rectangle in feet..

anonymous · Answer

(8+a)(6+a)=8*6 +72
now solve for a

diyadiya · Answer

Area of given rectangle = length x breadth =6 x 8=48 ft^2
Area of New rectangle =(8+x)(6+x)= 48 +72

mathteacher1729 · Answer

area = length times width 
A = LW

The original rectangle had area 8ft * 6ft = 48 ft^2

The new rectangle is 72ft^2 more so ... (8+x)*(6+x) = 48 ft^2 + 72 ft^2

You must solve for x.  :)

anonymous · Answer

12ft n 10ft

diyadiya · Answer

(8+x)(6+x)=120

48+8x+6x+x^2=120

x^2+14x+48=120

x^2+14x-72=0

anonymous · Answer

Thanks guys!!! :)