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3 years ago

2x²+10x=0 by using any method

Mathematics

1 answer:

iren [92.7K]3 years ago

8 0

2x²+10x=0

2x(x+5)=0

2x=0 or x+5=0

x=0 or x= -5

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Can someone explain how to do this please?

Rufina [12.5K]

for the columns where is less than or equal zero, use the first line of the function to calculate the value of f(x)

${ ( \frac{1}{3} ) }^{ - 2} - 1 = 9 - 1 = 8 \\ { ( \frac{1}{3} ) }^{ - 1} - 1 = 3 - 1 = 2 \\ { ( \frac{1}{3} ) }^{ 0} - 1 = 1 - 1 = 0$

for every x greater than zero, use the second line to determine the value

${3}^{1} - 2 = 3 - 2 = 1 \\ {3}^{2} - 2 = 9 - 2 = 7$

hope this helps and gives some insight what to do.

if there are open questions left, feel free to ask them in the comments

have a beautiful day

-Alex

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2 years ago

Evaluate <br> 4x3x8-2x(8x5-37)

Zigmanuir [339]

Answer:

$4x^1^1-16x^6+74x$

Step-by-step explanation:

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2 years ago

If f(x) = 3x + 2, what is f(5)?

Volgvan

Answer:

The 5 in the () is what the x is

Step-by-step explanation:

3(5)+2=17

6 0

2 years ago

Read 2 more answers

Which is equivalent to 49 3/2

Umnica [9.8K]

49^(3/2)
This is the same as (sqrt49)^3
7^3 = 343

8 0

3 years ago

A jar contains n nickels and d dimes. There is a total of 253 coins in the jar. The value of the coins is $15.95. How many nicke

defon

There are 187 nickels and 66 dimes in the jar.

Step-by-step explanation:

Given,

Total coins = 253

Value of coins = $15.95 = 15.95*100 = 1595 cents

Value of each nickel = 5 cents

Value of each dime = 10 cents

According to given statement;

x+y=253 Eqn 1

5x+10y=1595 Eqn 2

Multiplying Eqn 1 by 5

$5(x+y=253)\\5x+5y=1265\ \ \ Eqn\ 3$

Subtracting Eqn 3 from Eqn 2

$(5x+10y)-(5x+5y)=1595-1265\\5x+10y-5x-5y=330\\5y=330$

Dividing both sides by 5

$\frac{5y}{5}=\frac{330}{5}\\y=66$

Putting y=66 in Eqn 1

$x+66=253\\x=253-66\\x=187$

There are 187 nickels and 66 dimes in the jar.

Keywords: linear equation, elimination method

Learn more about elimination method at:

#LearnwithBrainly

5 0

3 years ago