Question

The length and breadth of a rectangular hall are ( x + 5 ) mand x m respectively . The carpet area of the hall is 84 m² write he quadratic equation to find the value of x .​

Answer 1

as there the area is 84m² then

(x+5)x = 84

so x²+5x-84 =0

then , x²+ (12-7)x - 84 =0

so, (x-7)(x+12)=0

so, x=7or*-12

x=7