Question

Referring to the figure, evaluate the expression shown
when a = 3, b = 7, c = 2
http://www.ppstest2.com/images2/AL9003.jpg
please help i have just a few test left and i need to get them done and i dont have my math mook i really need help

Answer 1

it gave you the values of a,b,c just plug them into the equation and solve

Answer 2

i have to make sure im right because im failing math
so im asking for help to see if i got the right anwsers

Answer 3

5

Answer 4

see thats not what i got

Answer 5

Referring to the figure, simplify the expression.
http://www.ppstest2.com/images2/AL9004.jpg

Answer 6

\[\sqrt{b ^{2}-4ac}\]\[\sqrt{7^{2}-(4\times3\times2)}\]\[\sqrt{49-24}\]\[\sqrt{25}=5\]

Answer 7

\[\sqrt{45}=\sqrt{5\times9}=\sqrt{5}\sqrt{9}=3\sqrt{5}\]

Answer 8

This problem you have to split up the number into to multiples and one should be a perfect square

Answer 9

a perfect square is a number that is equal to a number times itself

Answer 10

this is helpful when simplifying radicals because it can be brought out in front

Answer 11

are you understanding?

Answer 12

im following

Answer 13

Do you see how i was able to split up the radical into two separate radicals multiplied together. This works only for multiplication and division. Do you know what the term radical is when I use it?

Answer 14

no im dyslexic so its hard me to read it and get it

Answer 15

sry. radical is the square root symbol. That is the name of it

Answer 16

ok

Answer 17

example how would you simplify sqrt(32)?

Answer 18

think about the numbers that make up 32 first

Answer 19

1,32 2,16 4,8

Answer 20

now look at these numbers and are there any perfect squares?

Answer 21

remember the definition of a perfect square it a number that can be multiplied by itself to equal the "perfect square"

Answer 22

1,32?

Answer 23

1 is a perfect square because 1*1=1, but if you use these numbers we are left with our original equation. There must be a better choice...

Answer 24

ok

Answer 25

4,8 is an option. 4 is a perfect square 2*2=4, but if we use these numbers we are left with \[2\sqrt{8}\]and that is not simplified all the way because 8 has perfect squares, 2 and 4. If you got to this point you could just simplify it again and you would get the correct answer. But the fastest way is to use 2,16. 4*4=16

Answer 26

I have to go to class. good luck. feel free to bring me into your future questions by doing this, @ChmE and I will be linked in.

Answer 27

kk thank you!