Math thread -
- Thread starter Monika H.
- Start date
16:8 = 2:1
Find the value of x:
9x^2 + 17x + 46 = 12
Find the value of x:
9x^2 + 17x + 46 = 12
Equation got no solution. The discriminant is less than 0.
Next
(x - 1)2 + 2x + 3(x - 1) = (x + 2)2
I used to be good at math but I forgot so much of it 
So you don't know how to solve this? You need some repetition?I used to be good at math but I forgot so much of it
x = 9/5?
I always sucked at math and could never catch onto it for some reason.
It's not?
I did the problem again, and it is. This is the fraction 9/5 btw. Are you sure?
Math is actually one of the funniest subjects once you get the hang of it.
Say F whoever wants the solution
x1/2 = 0.94 +/- 1.69i (rounded to nice)
Show or disprove the following:
FOR ALL x (EXISTS y (-Q(x, (f(y)) AND (P(x) -> EXISTS y R(y)) AND P(x)) <=> FORALL x EXISTS y ((-Q(x, f(y)) AND R(y)) AND P(x))
Well I tried although school and never caught on. Now school is over for me and I pretty much forgot everything outside of basic baby math.
It's not.
The method is thus
(x - 1)2 + 2x + 3(x - 1) = (x + 2)2
x2 - 2x + 1 + 2x + 3x - 3 = x2 + 4x + 4
x2 - x2 - 2x + 2x + 3x - 4x = 3 - 1 + 4
- x = 6
if you give me one minute I'll even do the verification.
Verification
(x - 1)2 + 2x + 3(x - 1) = (x + 2)2
(-6 - 1)2 + 2·(-6) + 3·(-6 - 1) = (-6 + 2)2
(-7)2 - 12 + 3·(-7) = (-4)2
49 -12 -21 = 16
16 = 16
(x - 1)2 + 2x + 3(x - 1) = (x + 2)2
(-6 - 1)2 + 2·(-6) + 3·(-6 - 1) = (-6 + 2)2
(-7)2 - 12 + 3·(-7) = (-4)2
49 -12 -21 = 16
16 = 16
So the equation is impossible.
This one's thoug. I gotta write it down and think on it.
No one specified it had to be in real space.
Verification?
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