Question

if side of the square of increased by 5 and change in area was 165 then find the value of side of the square

Answer 1

let the side be x

area of square=side²

(x+5)²=x²+165

x²+10x+25=x²+165 (using (a+b)² identity)

both the x² gets cancelled

10x=165-25

10x=120

x=120÷10

x=12 units