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3 years ago

REALIZAR CADA ELERCICIO POR LOS TRES METIDOS EXPLICADOS EN CLASE

Mathematics

1 answer:

meriva3 years ago

5 0

Hello!

Answer:

1. x= 1 / y= 2 / z= -3 / (1 ; 2 ; -3)

2. x= 3 / y= -5 / z= 8 / (3 ; -5 ; 8)

Step-by-step explanation:

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3 years ago

Which are the solutions of x2 = –7x – 8?

vovangra [49]

Answer:

The solutions are:

$x_1=\frac{-7+\sqrt{17}}{2}$ $x_2=\frac{-7-\sqrt{17}}{2}$

Step-by-step explanation:

We have the following quadratic equation

$x^2 = -7x - 8$

We can rewrite the equation as follows

$x^2+7x + 8=0$

Now we use the quadratic formula to solve the equation

For an equation of the form $ax ^ 2 + bx + c = 0$ the quadratic formula is:

$x=\frac{-b\±\sqrt{b^2-4ac}}{2a}$

In this case:

$a=1,\ b=7,\ c=8$

Then:

$x=\frac{-7\±\sqrt{7^2-4(1)(8)}}{2(1)}$

$x=\frac{-7\±\sqrt{49-32}}{2}$

$x=\frac{-7\±\sqrt{17}}{2}$

$x_1=\frac{-7+\sqrt{17}}{2}$

$x_2=\frac{-7-\sqrt{17}}{2}$

7 0

3 years ago

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Can anyone answer -4(3-x)-7x and show the work !

Dafna1 [17]

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3 years ago

Solve: 1.2n+1=1-n HELP PLS ASAP WILL GIVE BRAINLIEST IF CORRECT

ahrayia [7]

Answer:

n = 0

Step-by-step explanation:

1.2n + 1 = 1 - n

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1.2n + n = 1 - 1

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3 years ago

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Tanya [424]

Answer:

Step 1

Step-by-step explanation:

You should isolate the variable, not try to get rid of it. Also, you have to divide both sides by the same number or variable(can't divide one side by a and the other side by 7- it has to be the same).

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