Question

Tasha is planning an expansion of a square flower garden in a city park. If each side of the original garden is increased by 7 m, the new total area of the garden will be 144 m². Find the length of each side of the original garden.

A) 19 m
B) 12 m
C) 5 m
D) √5 m

Answer 1

x - the length of each side of the original garden
A = x²
( x + 7 )² = 144 /√
x + 7 = 12, or x + 7 = - 12;
x = 12 - 7
x = 5 ( another solution in negative )
Answer:
C ) 5 m