anonymous
  • anonymous
x^2-9x+20 factorise quadratics
Algebra
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
nubeer
  • nubeer
familiar with quadratic formula?
anonymous
  • anonymous
no :(
cwrw238
  • cwrw238
this one can be factorized

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

hartnn
  • hartnn
can u factorize @Raeee_009 ?
hba
  • hba
Quadratic formula \[x=-b \pm \sqrt{b^2-4ac}/2a\]
nubeer
  • nubeer
\[x = \frac{ -b \pm \sqrt{b ^{2}-4ac } }{ 2a}\] this is the quadratic formula now look at your equation it's x^2-9x+20 so a =1 ,b = -9 , c = 20 just plug in values you will get 2 values of x
anonymous
  • anonymous
that is so confusing
cwrw238
  • cwrw238
yes - you asked about factoring quadratics factor to the form (x +/- a)(x +/- b)
cwrw238
  • cwrw238
to find a and b you need the product ad = +20 and sum = -9 can u think of 2 numbers which fit this requirement?
cwrw238
  • cwrw238
* product ab = + 20
anonymous
  • anonymous
hmm.. still don't get it :(
cwrw238
  • cwrw238
20 = -4 * -5 right?
anonymous
  • anonymous
yeah
cwrw238
  • cwrw238
and -4 + -5 = ?
hba
  • hba
|dw:1353601861741:dw|
anonymous
  • anonymous
-9
cwrw238
  • cwrw238
so thats your values of a and b hba has illustrated the process in his drawing
anonymous
  • anonymous
ohh im understanding a bit now so is the answer (x-4) (x+9)
cwrw238
  • cwrw238
yea
hba
  • hba
@cwrw238 No.
cwrw238
  • cwrw238
hba - your method is slightly different to mine - true
hba
  • hba
I am talking about the answer she got ?
anonymous
  • anonymous
(x-4)(x-5)
cwrw238
  • cwrw238
oh yes - i misread it (x - 4)(x - 5) is correct solution a = -4 and b = -5 raee_009
hba
  • hba
@Raeee_009 Please see my illustration and try to learn ? Where are you getting confused ?
anonymous
  • anonymous
ohhhh! i get it now! thank you so much eveyone
hba
  • hba
Your'e welcome.
anonymous
  • anonymous
one quick question does a + and - = - ?
hba
  • hba
Well (+)(+)=+ (+)(-)=- (-)(-)=+ Got it ?
anonymous
  • anonymous
ohh yeah thanks :D
anonymous
  • anonymous
so would x^2-6x-7=(x-7)(x+1)
cwrw238
  • cwrw238
right
hba
  • hba
|dw:1353603740199:dw| @Raeee_009 Awesome :D

Looking for something else?

Not the answer you are looking for? Search for more explanations.