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I'm trying to multiply this and keep getting the wrong answer:

(x - 5)(-0.025x + 220)

I have used the FOIL method and I have multiplied (x - 5) -0.025x and then multiplied (x - 5) 220.
Both methods I get the same answer.

But... the answer book and the teacher say it's -0.025x^2 + 219.875x - 1100.

My problem is that I don't get the 219.875x -- because when I multiply the -5 times -0.025x I get a positive number that adds up to 220x.

Could you tell me what I am doing wrong, please?

1 answer

the book is wrong
I get -0.025x^2 + 220.125x - 1100
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