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kari74 [83]
3 years ago
7

What is the exact value for the expression the square root of 56. − the square root of 14. + the square root of 126.? Simplify i

f possible.
the square root of 14.

4 the square root of 14.

2 the square root of 42.

8 the square root of 42.

...?
Mathematics
2 answers:
Olenka [21]3 years ago
6 0
Sqr root of 56 - sqr root of 14 + sqr root of 126= sqr root of (4x14) - sqr root of 14 + sqr root of (9x14)= 2(sqr root of 14) - (sqr root of 14) + 3(sqr root of 14)= 4(sqr root of 14)
The right answer will be B.

hjlf3 years ago
6 0

Answer:

B-  \sqrt(56)-\sqrt(14)+\sqrt(126)=14.966

Step-by-step explanation:

Given equation : square root of 56 − the square root of 14 + the square root of 126    or     \sqrt(56)-\sqrt(14)+\sqrt(126)

Solution of the equation :

\sqrt(56)-\sqrt(14)+\sqrt(126)

= 2\sqrt(14)-\sqrt(14)+3\sqrt(14)

= \sqrt(14)(2-1+3)

= 4\sqrt(14)

=14.966

Now,

  • square root of 14 =√14 =3.741
  • 4 the square root of 14 = 4√14 = 14.966
  • 2 the square root of 42= 2√42 = 12.961
  • 8 the square root of 42 = 8√42= 51.845

Therefore, Option B is correct

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