Question

The base of a rectangle is 5 cm more than its breadth. Its
area is 84 sq.cm. Find its dimensions.​

Answer 1

Step-by-step explanation:

let the bredth be x,

the ,length be x+5 ,

so, area = l×b

= x(x+5)

84 = x² +5x

hence, x²+5x -84 = 0

x² +12x -7x -84 = 0

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

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

hence, x = 7 and -12