geno3141

Since the last term is positive, either both signs are positive or both signs are negative.

Sine the middle term is negative, both signs are negative. This eliminates two of the possible answers.

Now, you will need to multiply the two numbers of the last term to get 36 and (ignoring the sign) add the two numbers of the last term to get the middle term; this will give you the right answer.

6 x 6 = 36  Does 6 + 6 = 12?

9 X 4 = 36  Does 9 + 4 = 12?

(1 googol)²  =  (10^10^100)²

(k + h)³  =  (k + h)[(k + h)²]  = (k + h)[k² + 2kh + h²]

                = k³  + 2k²h + kh² + hk² + 2kh² + h³ 

                = k³  + 3k²h + 3kh² + h³ 

You may want to check out Pascal's Triangle on the net, or ask your teacher for a quicker way.

In the second problem, since you know SSS, use the Law of Cosines.

m² = l² + n² - 2·l·n·cos(M)

14² = 17² + 11² - 2·17·11·cos(M)

196  =  289 + 121 - 374·cos(M)

196  =  410 -374·cos(M)

-214  =  -374·cos(M)

0.57219  =  cos(M)

M  =  55.1°

9 x 2e  =  18e

a +4 ≥ 8                                              (Subtract 4 from both sides.)

a + 4 - 4 ≥ 8 - 4

a ≥ 4

2a(2a² +2ab + 1)                          Using an extended distributive property:

2a·2a² + 2a·2ab + 2a·1

4a³ + 4a²b + 2a

7  >  x/4 + 2                       First subtract 2 from both sides:

5  >  x/4                             Now multiply both sides by 4:

20  >  x

This doesn't seem to be fully explained.

If all of them weigh 50 pounds, they weigh 50 pounds.