Question

How would I slove ((x^2-9^2) +3^2) + x^2= ?

Answer 1

^2 means squared

Answer 2

Please help!!!

Answer 3

What do you mean by solve?

Answer 4

\[(x^2-9^2)+3^2+x^2\]

Answer 5

What exactly do you want to do with this

Answer 6

I got help from a tutor and he said for me to finish the problem I need to solve that.

Answer 7

You mean simplify

Answer 8

Just drop the brackets and collect like terms

Answer 9

oh and i forgot it equals to 12^2

Answer 10

\[(x^2-9^2)+3^2+x^2 = 12^2\]

Answer 11

yes

Answer 12

Ok first thing, lets drop the brackets and simplify the left side

Answer 13

ok

Answer 14

So go ahead and try that, and remember 9^2 = 81, and 3^2 = 9

Answer 15

12^2 = 144

Answer 16

The exponents tell you how many times it's being multiplied by itself

Answer 17

9^2 = 9 * 9 = 81

Answer 18

I got 6

Answer 19

What do you mean

Answer 20

I squared them and then got -72

Answer 21

then i squared 12

Answer 22

just show the math here step by step

Answer 23

Because you should get two solutions

Answer 24

wait I found a mistake

Answer 25

I don't know. I can't get it. The answers I chose from are: A 10.5 B 10 C 6 root 3 D 20

Answer 26

Is your answer one of those?

Answer 27

\[x^2-81+9+x^2=144\] dropping the brackets and squaring, so simplify the left side a bit what do we get

Answer 28

Take it step by step

Answer 29

2x^2 -72=144

Answer 30

Yes, good now what's next?

Answer 31

add 72

Answer 32

Right what do you get

Answer 33

216

Answer 34

Good so we have \[2x^2 = 216\]

Answer 35

next?

Answer 36

yes

Answer 37

divide 2

Answer 38

good then we get?

Answer 39

108

Answer 40

then we square root it

Answer 41

Right! When we square we actually get a positive and negative solution but it seems they just want a positive answer so lets say \[x=\sqrt{108}\]

Answer 42

but there is no answer like that in my multiple choice

Answer 43

Now we need to simplify 108 in the radical

Answer 44

the only radical there is, is 6 root 3

Answer 45

\[\sqrt{108} = \sqrt{36 \times 3} = 6\sqrt{3}\]

Answer 46

ok. Thanks!

Answer 47

Thank you! I got it correct!

Answer 48

Yw