Yahoo Answers: Answers and Comments for How long is a side of the original square banner? [Mathematics]
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enAU
Mon, 20 May 2019 01:49:40 +0000
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Yahoo Answers: Answers and Comments for How long is a side of the original square banner? [Mathematics]
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From Mike G: x = original side length in ft
(x+4)(x2) = 91...
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Mon, 20 May 2019 02:14:02 +0000
x = original side length in ft
(x+4)(x2) = 91
x^2+2x99 = 0
(x+11)(x9) = 0]
x = 9 ft

From RR: A square banner (call sides x)
...had 4 feet...
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https://au.answers.yahoo.com/question/index?qid=20190520014940AAZobSG
Mon, 20 May 2019 07:11:36 +0000
A square banner (call sides x)
...had 4 feet added its width
x + 4
...and 2 feet subtracted from its height.
x  2
The banner then had an area of 91 square feet.
(x+4)(x 2) = 91
x^2 +2x  8 = 91
x^2 + 2x 99 = 0
factorise
(x + 11)(x  9) = 0
x =  11 (reject negative value)
x = 9 feet

From Φ² = Φ+1: 91 = 7 * 13 (prime factors)
The side was origi...
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https://au.answers.yahoo.com/question/index?qid=20190520014940AAZobSG
Mon, 20 May 2019 02:17:34 +0000
91 = 7 * 13 (prime factors)
The side was originally 7+2 = 134 = 9 feet long.

From david: (x+4)(x2) = 91
x^2 + 2x  99 = 0
(x+11)(x9) ...
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https://au.answers.yahoo.com/question/index?qid=20190520014940AAZobSG
Mon, 20 May 2019 01:53:29 +0000
(x+4)(x2) = 91
x^2 + 2x  99 = 0
(x+11)(x9) = 0
x = 9 <<< answer