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How Do U Do This

2007-02-05 14:33:12 · 5 answers · asked by boyz_inblu3 1 in Science & Mathematics Mathematics

5 answers

x^2=5x+24
x^2-5x-24=0
(x+3)(x-8)=0

x=-3 and x=8

2007-02-05 14:37:47 · answer #1 · answered by PsychoCola 3 · 0 0

x^2 = 24 + 5x, or x^2 - 5x + 24 factors to (x - 8)(x + 3). So, the answers are 8 and -3.

To check this:

8^2 = 64 = 24 + 5 * 8

(-3)^2 = 9 = 24 + (-3) * 5

2007-02-05 22:39:58 · answer #2 · answered by Anonymous · 0 0

First thing, let's say the number is x

x^2 = 5x + 24
x^2 - 5x - 24 = 0
(x-8) (x+3) = 0

So, we have two probabilities:
First probability : x = 8
Second probability: x = -3

Let's check the first:
8^2 = 5*8 + 24
64 = 40 +24
64 = 64
PROVEN

Let's check the second:
(-3)^2 = 5*(-3) + 24
9 = (-15) + 24
9 = 9
PROVEN

So, the number can be either 8 or (-3)

2007-02-05 23:26:45 · answer #3 · answered by livin.dream 2 · 0 0

x^2 = 5x + 24 >>>>
x^2 - 5x - 24 = 0
and then you have to factor it out and you get x = 8 or -3

2007-02-05 22:39:38 · answer #4 · answered by Anonymous · 0 0

n - the number

n^2 = 24 + 5n

now solve the quadratic equation to get n...

2007-02-05 22:38:14 · answer #5 · answered by Anonymous · 0 0

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