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Expand and simplify

  • Thread starter Stacyg
  • Start date
25
0
Hi.
I have done this question multiple times and come up with a different answer each time.

Q. 1.) Expand and simplify
(3x-5)^2+(x-4)^2-10(x+4)(x-1)

So far I've gotten

= -72x +1
= 1 - 72x

And some others. Any help would be great.
 

Answers and Replies

Integral
Staff Emeritus
Science Advisor
Gold Member
7,184
55
Please show us your work, for example, what did you get for the expansion of each term?
 
25
0
okay. I end up with 10x^2 - 22x +41- 10x^2-10x-40x-40 taking everything out of the brackets.
 
454
0
That -22x is probably the result of the x terms in (3x-5)^2+(x-4)^2 but you made a sign error.
there is also a sign error in -10x-40x and in -40
 

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