Question

when each side of a square was increased by 7cm and its area became 144cm2 what is the length of the original square​

Answer 1

Answer:

Length of square is 5 cm

Step-by-step explanation:

area of square is a^2

The length is increased by 7 and area becomes 144

Therefore,

(a+7)(a+7)=144

(a+7)^2=144

a^2+14a+49=144

a^2+14a-95=0

By solving,

we get a=-19,5(length should not be in negative)

So a=5cm