Help with sqrare roots?

Question

16: sqrt - 9/121

17: sqrt 112x^4- sqrt 7x^4

18: sqrt 18 - sqrt 50

19: (3 sqrt x- sqrt y)( sqrt x-4 sqrt y)

20: 12-15 sqrt 6+8 sqrt 6-10 sqrt 36

Answer 1

16. 3/11

17.  

18. 7.07

19.

20.

did i help you at all

Answer 2

first you have to spell square right

Answer 3

PROBLEM 16:

sqrt - 9/121

= (3i)/(11) = Final Answer

PROBLEM 17:

sqrt 112x^4 - sqrt 7x^4

= 4√7x^4 - √7x^4

= 3√7x^4

= 3x^2√7 = Final Answer

PROBLEM 18:

sqrt 18 - sqrt 50

= 3√2 - 5√2

= -2√2 = Final Answer

PROBLEM 19:

(3sqrt x - sqrt y)(sqrt x - 4sqrt y)

= 3x - 12√xy - √xy + 4y

= 3x - 13√xy + 4y = Final Answer

PROBLEM 20:

12 - 15 sqrt 6 + 8 sqrt 6 - 10 sqrt 36

= 12 - 15√6 + 8√6 - 10√36

= 12 - 15√6 + 8√6 - 10 * 6

= 12 - 7√6 - 60

= -48 - 7√6 = Final Answer

Answer 4

16: sqrt - 9/121

√-9/ ( 11)

cant do √ of -9 in the real world unless u have studied complex numbers then there is another answer

17: sqrt 112x^4- sqrt 7x^4 = x^2√16√7 - x^2 √7 = 4x^2√7 - 1x^2√7 =

3x^2 √7

18: sqrt 18 - sqrt 50

= √9*√2 - √25*√2 = 3√2-5√2 = -2√2

19: (3 sqrt x- sqrt y)( sqrt x-4 sqrt y)

= 3x - 12√(xy) -1√(xy) +4y

= 3x-13√(xy) +4y

20: 12-15 sqrt 6+8 sqrt 6-10 sqrt 36

12-15 sqrt 6+8 sqrt 6-10*6

12-15 sqrt 6+8 sqrt 6-60

- 48 -7√6