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otez555 [7]
3 years ago
15

A rectangle poster covers an area of 380.16 square inches of a display board. The width of the poster is 12 inches less than its

length. Find the width of the poster.
Mathematics
1 answer:
coldgirl [10]3 years ago
7 0
Let the width = x -12
the length = x
we have this area equation: x(x-12)=380.16
=>x^2-12x-380.16=0
=>(5x-132)(5x+72)=0
=>x= 132/5 and x= -72/5 (no)

=>The width of the poster is: 132/5 -12 =72/5 inches 
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