Asked by Jing
A rectangular field has a width of x meters.
The length of the field is 25m greater than twice the width of the field.
The area of the field is 450m²
Work out the length of the field.
Someone please help me
The length of the field is 25m greater than twice the width of the field.
The area of the field is 450m²
Work out the length of the field.
Someone please help me
Answers
Answered by
Anonymous
y = 2 x + 25
x y = 450
so x = 450/y
y = 2 (450/y) + 25
y^2 = 900 + 25 y
y^2 - 25 y - 900 = 0
(y-45)(y+20) = 0
y = 45
x y = 450
so x = 450/y
y = 2 (450/y) + 25
y^2 = 900 + 25 y
y^2 - 25 y - 900 = 0
(y-45)(y+20) = 0
y = 45
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