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The product of 2 consecutive odd numbers is 10 more than the square of the smaller number. Find the smaller number.
Can somone give me the formula for this? THANKS!

2007-09-18 09:30:41 · 7 answers · asked by gamerdude1818 1 in Science & Mathematics Mathematics

7 answers

the smaller number is 5.

(x)(x+2)=x^2+10

x^2+2x=x^2+10

2x+10,

x=5

2007-09-18 09:36:25 · answer #1 · answered by peteryoung144 6 · 1 0

If one number is x, the 'next' odd number is x+2 (i.e., if x is 7, x+2 would be 9 to get to the next odd)...

x(x+2) = 10 + x^2
x^2 + 2x = x^2 + 10
2x = 10
x = 5
(x+2 = 7, which is your second number)

2007-09-18 16:37:25 · answer #2 · answered by Michael W 3 · 0 0

let x be the first odd number
x + 2 is the second odd number

pruduct means multilication

x(x + 2) = 10 + x^2

x^2 + 2x = 10 + x^2

2x = 10

x = 5

the smaller number is 5

2007-09-18 16:37:07 · answer #3 · answered by      7 · 1 0

(2x + 1)(2x+ 3) = 10 + (2x+1)^2. So
4x^2 + 8x + 3 = 10 + 4x^2 + 4x+ 1, and
4x = 8, and x = 2, so the numbers are 5, 7.

Test it: 35 = 10 + 5^2 -- ok

2007-09-18 16:37:22 · answer #4 · answered by John V 6 · 0 0

Let n be the smaller odd number. Then n+2 is the larger and

n*(n+2) = n^2+10

n^2 +2n = n^2 +10

2n = 10

n=5

n+2 =7

2007-09-18 16:37:39 · answer #5 · answered by nyphdinmd 7 · 0 0

x*(x+2) = x^2+10 where x is the smaller and x+2 is the larger number

hope you can solve this

2007-09-18 16:35:50 · answer #6 · answered by Anonymous · 0 0

let nos are x & x+2
so x(x+2)=x^2+10
or x^2+2x=x^2+10
or x=5 & x+2=7

2007-09-18 16:38:15 · answer #7 · answered by MAHAANIM07 4 · 0 0

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