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Not good at math.
Can someone please explain how do to these problems. ( In steps if possible )
the directions say Factor each of the following
1.7y-7
2.2x²+8x+4
3.b²-25
4.y²-6y+8
thanks soo much
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1) it becomes 7(y-1) because they both have a 7 in common. NOTE: 7 divided by 7 = 1... it doesnt just disappeaer!
2) (2x+2)(x+2) than you do the "foil" technique, and if you don't know what that is leave on in my inbox im really good at math =]
3) square roots: (b-5)(b+5) SINCEEE its minus 25 instead of pluss, than thats why theres two brackets. if it was b²+25, than it would be (b+5)²
4) (y-4)(y-2) ones with only one variable² are eaaaasy. because than you just put it in as the first letter of each bracket. than with the 6 and 8>> you need factors of 8 that add up to make -6:
-2x-4=8, and -2 + -4 = -6
that easyy
check your work by foiling
hope i helped
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Ok so what you are trying to do is "un-distribute". You try to take something out (by dividing,etc) from both parts. Its better if i show you.
1.7y-7 They both have a 7 in them so you take the 7 out so it becomes: 7(y-1).
2.For the second one you see if you can divide each number by a number. (You can) Also you see if they all have the same variable, if they do you take it out, if they dont just leave it.
3. Involves the use of square roots. You can put a square root over each number to get. the square root of bsquared is b and 5 is the sq. root of 25. (this one im not positive on)
Basicly, try to do the opposite of distributing. Sometimes you cant factor them out and sometimes you can have several things taken out of each number. But remember, you have to take the same out of every number/variable. If you need anymore help, Im sure your teacher or even a website (or a math book) can help you even more.
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