Math Help

Archive for October, 2008

Question: I Need Help With Math? Factoring Trinomials?

1. 25f^2 – 40f + 16
2. x^2 + 12x + 32

Show your work please in order for me to understand how you got your answers. Thanks!

Answer: 1. Alerted by the 25 and the 16, I guessed that this just might have been a perfect square.

The minus sign in front of the 40f, together with the plus in front of the 16, means that the factors would be along the lines of (…f – …)(…f – …)

Next, I tried the following calculation in my head (FOIL) and it worked.

25f² – 40f + 16 = (5f – 4)²

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2. What two numbers have the SUM of 12 and the PRODUCT of 32?

32 = 2⁵, so there aren’t too many options to try; the numbers will be 1 and 32, 2 and 16, or 4 and 8.

x² + 12x + 32 = (x + 4)(x +

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Algebra – Factoring Trinomials Technique Bottoms Up Intuitive Math Help Trinomial Factor Sutcliffe

Question: I need help with answers to math (square roots)?

I know the material, but I am without a scientific calculator (life saver).
I have very simple problems I need help with as soon as possible. Any help is much appreciated!
√80
√300
√4 times √8
√18a-squared b
√21m-to the 8th
√12x y-squared
Like I said fairly simple. Please show all work. (teacher is very demanding..even though we use a calculator we must show work..go figure)

Answer: / is square root

/80
/4x4x5
4/5

/300
/25x4x3
10/3

/4 x /8
2 x/8
2 x 2/2
4/2

I have no more time hope this helps with the first couple!

Dividing Square Roots – YourTeacher.com – Math Help