Question

Simplify: (5+3√2) ( 5-3√2)

Answer 1

This looks like the factorization of the difference of two squares:
\[a ^{2}-b ^{2}=(a+b)(a-b)\]
So we can find the solution by first doing the following:
\[(5+3\sqrt{2})(5-3\sqrt{2})=5^{2}-(3\sqrt{2})^{2}\]
Can you simplify
\[5^{2}-(3\sqrt{2})^{2}=\ ?\]

Answer 2

19? @kropot72

Answer 3

Not really.
\[5^{2}=25\]
and
\[(3\sqrt{2})^{2}=18\]
So we get
\[25-18=\ ?\]

Answer 4

7 @kropot72

Answer 5

yup 7 is correct

Answer 6

can you help me
@nirmalnema

Answer 7

ya sure

Answer 8

(5x-1)^2=24

Answer 9

a=5x
b=-1
(a-b)^2=a^2 - 2ab + b^2
(5x-1)^2=
25x^2-10x+1=24
25x^2-10x-23=0

Answer 10

use the formula to solve the quadratic
\[(-b(\pm)\sqrt{b^2-4ac})/2a\]

Answer 11

a=25
b=-10
c=-23

Answer 12

can u solve it all the way?
@nirmalnema

Answer 13

@cutegirl
I'm sure he can.
Can YOU?

Answer 14

yaa..1st you try by yourself if you are not able to do then i will surely help u

Answer 15

2√6/5+1/5 ??

Answer 16

you will get 2 ans
1 one by taking + sign and other by taking - sign

Answer 17

1/5 -2√6/5

Answer 18

can you help me with this one?
(√7+√x) /(√7-√x)
@Nicole143