Question

the length of a rectangle is four greater than the width,the area is sixty. find the length & with of the rectangle?

Answer 1

let width =x , length =x+4
area = x(x+4) =60
=>x^2 + 4x -60 =0
=> x^2 +10x -6x -60 = 0
=> x(x +10) -6(x+10)=0
=> (x-6)(x+10) = 0

=> x=6, -10 as -10 is not possible...

width = 6 unit, length = 10 unit