If two opposite sides of a square are increased by 15 meters and the other sides are decreased by 13 meters, the area of the rectangle that is formed is 60 square meters. find the area of the original square.

Let side of the square = x m, then:-

(x + 15)(x - 13) = 60

x^2 + 2x - 195 - 60 = 0

x^2 + 2x - 255 = 0

(x - 15)( x + 17) = 0

x = 15 meters (answer)

add all the numbers and check the ones place.

the answer is 486. as the ones place is more than 4, the estimation will be the next 10 ie, 490

i believe the answer is letter c) 8

step-by-step explanation: