Get our expert's

answer on brainly

SEE EXPERT ANSWER

Get your **free** account and access **expert** answers to this and **thousands** of other questions.

See more answers at brainly.com

Get this expert

answer on brainly

SEE EXPERT ANSWER

Get your **free** account and access **expert** answers to this and **thousands** of other questions

x^3 -2.25x^2+2.25x^2-3x2-2.25x+2.25x-3x-15

simplified, it's x^3-3x^2-3x-15, right?

Not the answer you are looking for?

Search for more explanations.

[x^2-(-2.25+2.25)x + (-2.25)*2.25]x-[x^2-(-2.25+2.25)x + (-2.25)*2.25]-3=0

Where are you getting +-2.25 from? Neither has anything to do with sqrt(5).

sqrt(5) is approx 2.25

You don't want to be working with approximations here.

ok

x^3 - 3x^2 - 5x + 15

that would be x^2-5

(x^2-5) (x-3)=x^3 - 3x^2 - 5x + 15

right?

so, it's x^3+3x^2-5x-15?

Yes! Excellent! Just remember about subtracting negatives and you will be ok.

Okay, Thanks for the help!

No problem!

x3 + 3x2 - 5x - 15 is not the correct answer (just took the test)

Not the answer you are looking for?

Search for more explanations.