Ask your own question, for FREE!
Mathematics 18 Online
OpenStudy (anonymous):

please help will fan and medal. http://assets.openstudy.com/updates/attachments/55ce201ae4b0016bb016cf55-enchanted_bubbles-1439572007964-screenshot_1.png

OpenStudy (anonymous):

@pooja195

OpenStudy (anonymous):

@welshfella

OpenStudy (welshfella):

there are 3 zeros:- -1 duplicity 2 and 1 so in factor form it is (x+1)^2(x-1)

OpenStudy (anonymous):

I am confused.

OpenStudy (welshfella):

if you look at the graph you see that at x = -1 the graph touches the x-axis and the it pass through the point where x = 1 these are called the zeros of the function its a cubic function so it has 3 zeros;- 2 at x = -1 and 1 at x = 1 if we write (x + 1)^2(x - 1) = 0 we get x -1 = 0 or (x +1)^2 = 0 giving x = 1 and x = -1 (twice)

OpenStudy (welshfella):

so iy you expand (x - 1)(x + 1)(x + 1) you'll get the correct function

OpenStudy (welshfella):

do it by multiplying the last 2 factors first - giving x^2 + 2x + 1 so we have (x - 1)(x^2 + 2x+ 1) = ?

OpenStudy (anonymous):

\[x^3+x^2−x−1=?\]

OpenStudy (welshfella):

yep

OpenStudy (anonymous):

Thank you!

OpenStudy (welshfella):

welcome

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!