Question

The difference of two numbers is 4 and their product is 140. The smaller number is

Answer 1

let no. be x and y

x -- y = 4  [i]

xy = 140 [ii]

y^2+4y --140  = 0

y^2--10y+14y--140  = 0

y[y--10]+14[y--10] = 0

[y--10][y+14]  = 0

y = 10       and   x = 14