HI there. I have a question. Can anyone help?
I have this "supose to be easy" maths question that I can not do.
7,3575 + 147,15x = 1036.8(x)(x)
Can any help me here...... The answer is: x=181.11 but how do I get that?
First what is the distinction between 147,15 and 147.15, that is what is the decimal seperator here. (In other words: sort out your notation)
Then this looks like a quadratic, bring everything over to the same side and then use whatever technique you have been shown for solving quadratics.
RonL
Hallo ruan! Ek sal aanneem jy verstaan afrikaans.
Ek sal ook moet aanneem dat jy net bietjie deurmekaar geraak het met jou kommas en punte.
$\displaystyle 7,3575 + 147,15x = 1036,8 x^2$
Herrangskik nou eers.
$\displaystyle 1036,8 x^2 - 147,15x - 7,3575= 0$
Nou gebruik die kwadratiese formule om op te los, want ons gaan erg sukkel om te faktoriseer!
$\displaystyle x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$
$\displaystyle x = \frac{+147,15 \pm \sqrt{(-147,15)^2 - 4(1036,8)(-7,3575)}}{2(1036,8)}$
Nou ja, van hier af behoort dit vir jou maklik te wees om op te los!
Boonop die wortels is:
0,18110
-0,03918