A website that actually HAS the answer key (it can be copied out of the teacher's textbook.?

I'm looking for these answers. They are in Prentice Hall's Algebra 1: California Edition.



39. x^2+20x+99

40. x^2-20x+96

41. x^2-21x-72

43. x^2-25x+144

44. y^2-21y+108

45. a^2+a-132

46. a^2+9a-90A website that actually HAS the answer key (it can be copied out of the teacher's textbook.?
What's the question? Is it factoring?



If so, it's not that hard to just do the work. I'll show you the first one.



In factoring, if the second sign is a plus (like 39, 40, 43, 44) then the signs of both factors are the same as the first sign (so both + for 39, both minus for 40). If the second sign is a minus, then the factors have one of each (so for 41, one - and one +).



Next you want to find factors of the last coefficient than can be combined to give you the second coefficient. In your first problem there, factors of +99 are 33 and 3, or 11 and 9. 11+9 is 20, so you can factor this equation into (x+9)(x+11).



Let's go through the last one as well. Factors of -90 are -3 and 30 (or 3 and -30), 5 and -18 (or -5 and 18), 6 and -15 (or -6 and 15) and -9 and 10 (or 9 and -10). Which ones can we combine to get 9?

-3 + 30 = 27 and -30 + 3 = -27. so nope.

5 + -18 = -13 and -5 + 18 - 13, so nope.

-6 and 15 = 9. yes!

So we can factor this equation (a-6)(a+15).



Factoring is a difficult process to explain; you have to work at it until it "clicks." Learning to think algebraically like this is an extremely valuable skill, however, especially if you plan any further study of math or to ever do anything with computers.



It took me far less time to solve these myself than to even attempt to google a key. Cheating rarely saves time! Learn to do it yourself.A website that actually HAS the answer key (it can be copied out of the teacher's textbook.?
you could find a torrent of the book, or just suck it up and do the work. you probs wont find it. sorry.