Example 4: Adding and subtracting polynomials | Algebra I | Khan Academy

Simplify (x^3 + 3x - 6) + (-2x^2 + x - 2) - (3x - 4)

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[ztupidiezmartie]

I cant believe 2 minute worth of watching Khan Academy made more sense than 1 week with the teacher, and I still dont get it.
Thank you Khan Academy

[kashyappatel]

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[mohammedmannan]

This really helped, its easier to understand

[ragnarok]

Me:
Walks home from school, afraid to even think of the word "polynomial" cuz it, and what it means makes no sense.

Also me, after watching Khan Academy videos:
Good gods... It all makes sense now!

[shekaragarrick]

if -3x cancels out +3x isn't that 0? You said it would be x. For example, isn't 4x plus -3x answer is x?

[luvbeingmama]

why did you change that first addition sign to subtraction? right after the -6 it should be plus 2x squared right?