Question

The area of rectangle is 21 cm2 if one side exceeds the other by 4 cm find the dimention of the rectangle

Answer 1

Step-by-step explanation:

breadth of rectangle = x

length= x + 4

area of rectangle = length. breadth

21 = (x+4) x

21 = x sq + 4x

x sq + 4x -21 =0

x sq +7x - 3x - 21 =0

x (x + 7) - 3 (x + 7) = 0

(x + 7) (x -3) = 0

(x+7)=0 or (x-3)=0

x = -7 or x = 3

length is never negative

so x = 3

so breadth is 3 and length is (3+4) 7