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ElenaW [278]
3 years ago
10

What's the answer to both when simplifying the two radical expression?

Mathematics
1 answer:
OlgaM077 [116]3 years ago
7 0
( \sqrt{x} +2 \sqrt{5})*( \sqrt{x} -2 \sqrt{5}) =  \\  \\   ( \sqrt{x})^2- (\sqrt{x} *2 \sqrt{5})+(2 \sqrt{5}* \sqrt{x}) -(2 \sqrt{5})^2 =  \\  \\    x- 2\sqrt{5} \sqrt{x}+2 \sqrt{5} \sqrt{x} -(4*5)=  \\  \\   x -(4*5)=  \boxed{x-20}   \\  \\

( \sqrt{x}+ \sqrt{5}) ^2=   \\  \\   ( \sqrt{x})^2+2* \sqrt{x}* \sqrt{5} + (\sqrt{5}) ^2=   \\  \\   \boxed{  x +2 \sqrt{5x}+5}
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HELP HELP HELP HELP HELP HELP
dezoksy [38]
10 root 2
10^2 + 10^2 = 200
200 is 10 root 2
5 0
3 years ago
In 2002, Tiger Woods won the masters tournament. His scores were -4, -3, -2, and -1. What was his final score?
puteri [66]

Answer:

-10

Step-by-step explanation:

-4 + -3 = -7

-7 + -2 = -9

-9 + -1 = -10

3 0
2 years ago
What is the surface area of cone below Diameter AB=21 and distance from B to C =36
Vesnalui [34]

Answer:

1533.88261311522

Step-by-step explanation:

<em>Let r be the radius of the (base/circle)</em>

<em>and  L be the slant height of the cone</em>

<em>Formula ………………………………………………………………………………………………………</em>

The surface area of a cone = the (curved/lateral) surface area +  the base

                                             =\pi r^{2}\ \ \ +\ \ \ \pi Lr

=========================================

r=\frac{21}{2} =10.5

L = BC = 36

\text{surface area} =\pi \left( 10.5\right)^{2}  +\pi \times 36\times \left( 10.5\right)

                   =346.360590058275 + 1187.52202305694

                   =1533.88261311522

6 0
2 years ago
What is the perimeter of the triangle shown on the coordinate plane, to the nearest tenth of a unit?
miv72 [106K]

A geometry app shows lengths that add up to 27.4 units.


The Pythagorean theorem can be used to find the lengths of the segments. Each length is the square root of the sum of squares of the difference in x-coordinates and the difference in y-coordinates.


segment AB: length = √(3²+8²) = √73 ≈ 8.544

segment BC: length = √(7²+4²) = √65 ≈ 8.062

segment CA: length = √(10²+4²) = √116 ≈ 10.770


Then the total perimeter is the sum of these lengths:

... 8.544 +8.062 +10.770 = 27.376 ≈ 27.4 . . . . units

5 0
3 years ago
Divide: 28.324 : 0.4<br> A 0.7081<br> B 7,081<br> C 708.1<br> D 70.81
valina [46]

Answer:

D-70.81

Step-by-step explanation:

I did the math, this should be correct.

Good luck!

3 0
2 years ago
Read 2 more answers
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