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3 years ago

Completely factor: X + 9x + 20

Mathematics

2 answers:

zalisa [80]3 years ago

7 0

10(x+2) there is it

Paul [167]3 years ago

6 0

Answer:

10(x+2)

Step-by-step explanation:

x+9x+20

10x+20

10(x+2)

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Solve please and thank you

svet-max [94.6K]

Answer:

x = 13.5

Step-by-step explanation:

2/11 = 3/(3 + x)

6 + 2x = 33

2x = 27

x = 13.5

6 0

3 years ago

If –3 + i is a root of the polynomial function f(x), which of the following must also be a root of f(x)? –3 – i –3i 3 – i 3i

Troyanec [42]

Answer:

-3-i is the correct answer.

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

What are the zeros of the quadratic function f(x) = 2x2 – 10x – 3?

Natasha2012 [34]

Answer:

$x=\frac{50+\sqrt{31}}{2},\frac{50-\sqrt{31}}{2}$ are zeroes of given quadratic equation.

Step-by-step explanation:

We have been a quadratic equation:

$2x^2-10x-3$

We need to find the zeroes of quadratic equation

We have a formula to find zeroes of a quadratic equation:

$x=\frac{b^2\pm\sqrt{D}}{2a}\text{where}D=\sqrt{b^2-4ac}$

General form of quadratic equation is $ax^2+bx+c$

On comparing general equation with b given equation we get

a=2,b=-10,c=-3

On substituting the values in formula we get

$D=\sqrt{(-10)^2-4(2)(-3)}$

$\Rightarrow D=\sqrt{100+24}=\sqrt{124}$

Now substituting D in $x=\frac{b^2\pm\sqrt{D}}{2a}$ we get

$x=\frac{(-10)^2\pm\sqrt{124}}{2\cdot 2}$

$x=\frac{100\pm\sqrt{124}}{4}$

$x=\frac{100\pm2\sqrt{31}}{4}$

$x=\frac{50\pm\sqrt{31}}{2}$

Therefore, $x=\frac{50+\sqrt{31}}{2},\frac{50-\sqrt{31}}{2}$

5 0

3 years ago

Read 2 more answers

When dividing two integers the result will be negative. Please answer I have quiz due 11:59 pm

sladkih [1.3K]

Answer:

<u>If You divide 2 integers with different signs it will be negative, but to make it positive you divide the absolute values. So, only if one integer is negative and one is positive will the answer be negative</u>

Step-by-step explanation:

EXAMPLE: 8÷ (-4)=-2 but when using absolute value |8|÷ |4|=2

HOPE THIS HELPS!!!

5 0

3 years ago

1. In an arithmetic sequence, the first term is -2, the fourth term is 16, and the n-th term is 11,998

Rudik [331]

Answer:

see explanation

Step-by-step explanation:

The n th term of an arithmetic sequence is

$a_{n}$ = a₁ + (n - 1)d

(a)

Given a₁ = - 2 and a₄ = 16, then

a₁ + 3d = 16 , that is

- 2 + 3d = 16 ( add 2 to both sides )

3d = 18 ( divide both sides by 3 )

d = 6

--------------

(b)

Given

$a_{n}$ = 11998 , then

a₁ + (n - 1)d = 11998 , that is

- 2 + 6(n - 1) = 11998 ( add 2 to both sides )

6(n - 1) = 12000 ( divide both sides by 6 )

n - 1 = 2000 ( add 1 to both sides )

n = 2001

------------------

8 0

3 years ago