Question

negative 4 square root of x plus 9 equals 20

Answer 1

Are you trying to find the value of x?

Answer 2

yes

Answer 3

The value of x = 16

Answer 4

can you show me how?

Answer 5

\[-4\sqrt{x + 9} = 20\]

\[\sqrt{x + 9} = 20 \div -4\]

9 shifting -4 from left to right.
Now squaring on both sides.

\[(\sqrt{x + 9} ^2 = (-5)^2\]

x + 9 = 25

x = 25-9

x = 16

Answer 6

Please, wait a minute. The square root function is always positive. This equation does not have a solution

Answer 7

@britneyspears is right

Answer 8

thanksssss :))))

Answer 9

http://www.wolframalpha.com/input/?i=-+4sqrt%28x%2B9%29+%3D20

Answer 10

You're welcome!! Xo!

Answer 11

@satellite73 @experimentX

Answer 12

Please push on the wolframalpha link to see that this equation does not have a solution.
\[
\sqrt{x+9}\ge 0\\
-4\sqrt{x+9}\le 0\\
-4\sqrt{x+9} \ne 20

\]