Help with solving maths equations
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Help with solving maths equations

[From: ] [author: ] [Date: 12-06-06] [Hit: ]
!10 points to best answer!If x-10 = 4, then x=14 OR if x-10= -4 ,If x-2 =√12 , then x=2+√12 OR if x-2= -√12 ,......
how to do these??

a) 3(x-10)^2 / 4 = 12


b) x-2 = 12 / x-2

c)5-2x / 4 = -2 1/2

d) (3x + 2)^2 -1 = 8

THANKYOU ! thankyou thankyou !!! I never got a chance to ask my math teacher about these ones, and I have a big test coming up tomorrow. Your help would be so fantastic!!

10 points to best answer!

-
a) 3(x-10)^2 / 4 = 12
>> 3(x-10)^2 = 4 x 12
>> (x-10)^2 = 48/3
>> (x-10)^2 = 16
>> x-10 = +- 4 [Square root]

If x-10 = 4, then x=14 OR if x-10= -4 , then x = 6 <<<
b) x-2 = 12 / x-2
>> (x-2)(x-2) =12
>> (x-2)^2 = 12
>> x-2 = +-√12

If x-2 =√12 , then x=2+√12 OR if x-2= -√12 , then x = 2-√12 <<<
d) (3x + 2)^2 -1 = 8
>> (3x + 2)^2 = 9
>> (3x + 2) = +-3

If 3x+2 = 3
>> 3x=1
>> x = 1/3

OR if 3x+2 = -3
>> 3x = -5
>> x = -5/3
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