Question 360493
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Hi,
let x represent the width, length then is (2x+5)
x(2x+5) = 42m^2
2x^2 + 5x - 42m^2 = 0
(2x - 7)(x + 6) = 0
x + 6 = 0
x = -6 cannot use
2x - 7 = 0
x = 7/2m 
width is 7/2m and the length is (7 + 5) = 12m
checking our answer
7/2m * 12m = 42m^2