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I will like to solve this equation using the quadratic formula:

here it is...

x^2 - 5x =0 (x^2 =x square)

I tried doing it but got stuck on the way..
Quadratic formula....Thanks in advance.

2007-09-07 02:10:25 · 7 answers · asked by Anonymous in Science & Mathematics Mathematics

Please resolve the equation using the quadratic formula thanks

Jan W you just did the oposite thing..you didnt even bother reading my question

2007-09-07 02:19:54 · update #1

7 answers

x = [ 5 ±√(25) ] / 2
x = 10 / 2 , x = 0
x = 5 , x = 0

Can also be solved using:-
(x) (x - 5) = 0
x = 0 , x = 5 as above.

2007-09-07 03:42:16 · answer #1 · answered by Como 7 · 1 0

well you don't have to do the quadratic formula to solve this one.

x(x - 5) = 0
x = 0, 5

using the formula: a = 1 b = -5 c = 0
x = 5 +- sqrt(25 - 4(1)(0))
-------------------------------------
2(1)

x = (5 +- sqrt(25)) / 2
x = (5 +- 5)/2
x = 10/2 = 5
x = 0/2 = 0

2007-09-07 02:17:14 · answer #2 · answered by Becky M 4 · 1 0

x^2 - 5x = 0 ==> x(x-5) = 0, therefore:
x1=0, x2=5.

Quadratic formula:

x1,2 = (-b +- SQRT(b^2-4ac))/2a

where:

SQRT means square root
a=1, b=5, c=0

Substitute into the equation:

x1,2 = ((5 +-SQRT(25-4*1*0))/2 ==>
x1,2 = ((5 +-SQRT(25))/2 ==>
x1,2 = (5 +-5)/2

x1 = (5+5)/2 = 10/2 = 5
x2 = (5-5)/2 = 0/2 = 0

2007-09-07 02:30:20 · answer #3 · answered by Anthony P - Greece 2 · 1 1

Using the quadratic formula on this problem is totally lame. But since you asked, here is goes..
If ax^2 + bx + c = 0
then x = [-b +/- sqrt(b^2 - 4ac)]/(2a)
For your problem a = 1, b = -5, c = 0 so
b^2 - 4ac = 25 - 0 = 25
sqrt(b^2 - 4ac) = +/-5
then x = [5 +/- 5]/2
So x = 0 or x = 5

2007-09-07 02:57:50 · answer #4 · answered by Anonymous · 0 2

You do realize that you can solve it easier via factoring, right? That said, and mentioning that your "c" = 0,

x = (-b +/- SQRT(b^2 - 4ac)) / 2a ==

x = (-(-5) +/- SQRT((-5)^2 - 4(1)(0)) / 2(1) ==

x = (5 +/- SQRT(25 - 0)) / 2 ==

x = (5 +/- 5) / 2 ==

x = (0, 5)

2007-09-07 02:19:41 · answer #5 · answered by Gary H 6 · 1 0

x² - 5x =0
==> x(x - 5) = 0

x = 0

-or-

x - 5 = 0
==> x = 5

So: x = 0, 5

:)

2007-09-07 02:18:58 · answer #6 · answered by Anonymous · 0 1

x^2 - 5x =x * (x-5)
The condition
x * (x-5)=0
can be met when x=0 or when x=5

2007-09-07 02:16:36 · answer #7 · answered by Jan W 1 · 0 2

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