5) The grass in the backyard of a house is a square with side length 10m. A square patio is placed in the centre. If the side length, in meters, of the patio is x, then the area of
the grass remaining is given by the relation A=-x? +100.
a) Graph the relation.
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b) Find the intercepts. What do they represent?
c) How do the equation change if the grass in the backyard of a house is a square with
side length 12 m.
d) For what values of x is each equation valid?