Question

Find the value of x if the area is 10cm^2,length is (4x-1)cm and width is 2xcm

Answer 1

Answer:

Step-by-step explanation:

area = length x width

10 = (4x-1) * (2x)

10 = 8x^2 - 2x

8x^2 - 2x -10 =0

4x^2 - x -5 =0

By quadratic formula,

x = {- (-1) + or - Root ( (-1)^2 - 4(4)(-5) )} / 8 = 10/8 or -8/8(-ve not possible)

x = 10/8 = 5/4