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3 years ago

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Mathematics

1 answer:

Rasek [7]3 years ago

3 0

The answer is A and B

its hard to use the radical sign typing here
but if you need it i can update my answer

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Which decimal is equivalent to 8.100

larisa86 [58]

Answer:

81/10

Step-by-step explanation:

i just figured it out i really don't have one but i hope it helps

7 0

2 years ago

Which of the following expressions is equivalent to a3 + b3?

lubasha [3.4K]

ANSWER
${a}^{3} + {b}^{3} = (a + b)( {a}^{2 } - ab + {b}^{2} )$

EXPLANATION

To find the expression that is equivalent to
${a}^{3} + {b}^{3}$
we must first expand
${(a + b)}^{3}$
Then we rearrange to find the required expression.

So let's get started.

${(a + b)}^{3} = (a + b) {(a + b)}^{2}$

We expand the parenthesis on the right hand side to get,

${(a + b)}^{3} = (a + b) ( {a}^{2} + 2ab + {b}^{2} )$

We expand again to obtain,

${(a + b)}^{3} = {a}^{3} + 3 {a}^{2}b + 3a {b}^{2} + {b}^{3}$

Let us group the cubed terms on the right hand side to get,

${(a + b)}^{3} = {a}^{3} + {b}^{3} + 3 {a}^{2}b + 3a {b}^{2}$

${(a + b)}^{3} = {a}^{3} + {b}^{3} + 3ab (a+ b)$

We make the cubed terms the subject,

${(a + b)}^{3} - 3ab (a+ b) = {a}^{3} + {b}^{3}$

We factor to get,

$(a + b)({(a + b)}^{2} - 3ab ) = {a}^{3} + {b}^{3}$

We expand the bracket on the left hand side to get,

$(a + b)( {a}^{2} + 2ab + {b}^{2} - 3ab ) = {a}^{3} + {b}^{3}$

We finally simplify to get,

$(a + b)( {a}^{2} - ab + {b}^{2} ) = {a}^{3} + {b}^{3}$

5 0

2 years ago

Read 2 more answers

What’s the answer of the equation:<br><br> 104mn + (-84mn) =36

inn [45]

Answer:

$1\frac{4}{5}mn$

Step-by-step explanation:

$104mn - 84mn = 36 \\ \\ 20mn = 36 \\ \\ 1\frac{4}{5}mn$

This what you can do unless you are solving for either variable.

I am joyous to assist you anytime.

8 0

2 years ago

Hey, what is 2000x5?

Gnoma [55]

Answer:

Step-by-step explanation:

2000x5=10,000

3 0

3 years ago

How many kilometers are there in 9000000cm

tekilochka [14]

QUESTION:- How many kilometers are there in 9000000cm.

ANSWER:-

$1cm = {10}^{ - 5} km \\ 9000000cm =9000000 \times {10}^{ - 5} km \\ 9 \times {10}^{6} cm = 9 \times {10}^{6} \times {10}^{ - 5} \\ 9 \times {10}^{6} cm = 9 \times {10}^{6 - 5} \\ 9 \times {10}^{6} cm = 90km$

7 0

2 years ago

Read 2 more answers