3 years ago

4/3+căn5 - 8/1+căn5 +15/căn5

Mathematics

1 answer:

padilas [110]3 years ago

4 0

Answer:

$A= \frac{4}{3 + \sqrt{5} } - \frac{8}{1 + \sqrt{5} } + \frac{15}{ \sqrt{5} }$

$= \frac{4(3 - \sqrt{5)} }{4} - \frac{8(1 - \sqrt{5} }{ - 4} + \frac{15 \sqrt{5} }{5} = 3 - \sqrt{5 + 2 - 2 \sqrt{5 + 3 \sqrt{5 = 5} } }$

Step-by-step explanation:

$Cảm \: ơn!!!!$

You might be interested in

How to solve the system of equations using elimination for 2x+3y=6 and x+2y=5

weeeeeb [17]

I got yah! Do you want a direct answer or show work?

Direct answer x= -3 y=4

7 0

3 years ago

Read 2 more answers

A dog groomer earns $450 each week plus $8 per dog she washes. She uses the expression 450 + 8d to find her total earnings each

Rudik [331]

Answer:

Step-by-step explanation:

$8 dollars per dog + $450

8 dogs washed so 8*8 for money earned for washing dogs

450 + 8d = 450 + (8 * 8) = 450 + 64 = she earned $514 dollars lase week

7 0

3 years ago

Read 2 more answers

What is the factored form of 8x2 + 12x?

bija089 [108]

The factored form is B. 4x(2x+3)

5 0

3 years ago

Nick wants to fence in a rectangular section of his yard to make a dog run that has a perimeter of at least 48 ft. The total len

tatyana61 [14]

Answer:

Step-by-step explanation:

7 0

4 years ago

Match the reasons with the statements. GIVEN: x2 + 6x + 2x + 12 = 0 TO PROVE: x = -6 or x = -2 1. x2 + 6x + 2x + 12 = 0 Subtract

mestny [16]

Given: $x^2 + 6x + 2x + 12 = 0.$

1. Combining like terms (here terms 6x and 2x both contain x, then we can combine them):

$x^2+(6x+2x)+12=0,\\\\x^2+8x+12=0.$

2. Distributive postulate:

$x^2+8x+12=(x+6)(x+2).$

The equation is

$(x+6)(x+2)=0.$

3. Zero product postulate (zero product postulate state that if a product of two factors is equal to zero, then first factor is equal to zero or second factor is equal to zero):

$x+6=0 \text{ or } x+2=0.$

4. Subtraction property of equality:

a) subtract 6 from the first equation:

$x+6=0\Rightarrow x+6-6=-6, \ x=-6.$

b) subtract 2 from the second equation:

$x+2=0\Rightarrow x+2-2=-2, \ x=-2.$

6 0

3 years ago

Read 2 more answers