All categories

3 years ago

What is the first step in solving x^2+2x+3=0

Mathematics

2 answers:

Westkost [7]3 years ago

7 0

First subtract three from both sides. then you have $x^{2}$ +2x=-3 and you solve from there

Neporo4naja [7]3 years ago

6 0

Is the question asking by completing the square?
X^2+2X+3=0
X^2+2x+1+2=0
(x+1)^2+2=0
(x+1)^2=-2
x+1=squr root 2i or x+1=-sqr root 2i

You might be interested in

How can we eliminate an imaginary from the denominator? Simplify 2/(3+5i) to demonstrate.

alexira [117]

Multiply by the conjugate and simplify
3/17 - 5i/17

Hope this helps! :)

7 0

3 years ago

Is -30 - (-52) positive or negative?

Luba_88 [7]

Answer:

positive

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

4-2x=11 how do I solve

Bingel [31]

Hey there!☺

$Answer:\boxed{x=\frac{-7}{2}}$

$Explanation:$

$4-2x=11$

In our first step, we will simplify both sides of the equation:

$4+-2x=11\\-2x+4=11$

Now subtract 4 from both sides:

$-2x+4-4=11-4\\-2x=7$

In our last step, we will divide both sides by -2:

$\frac{-2x}{2}=\frac{7}{-2}\\ x=\frac{-7}{2}$

x=-7/2 is your answer.

Hope this helps!☺

3 0

3 years ago

Solve for x: −1 < x + 3 < 5

Gnesinka [82]

Answer:

-4<x<2

Step-by-step explanation:

If you have any questions about the way I solved it, don't hesitate to ask ÷)

7 0

3 years ago

Write a polynomial function of minimum degree with real coefficients whose zeros include those listed. Write the polynomial in s

Jobisdone [24]

Answer:

$f(x)=x^4-9x^2-50x-150$

Step-by-step explanation:

Let f(x) be the polynomial function of minimum degree with real coefficients whose zeros are 5, -3, and -1 + 3i be f(x).

By the complex conjugate property of polynomials, -1-3i is also a root of this polynomial.

Therefore the polynomial in factored form is $f(x)=(x-5)(x+3)(x-(-1+3i))(x-(-1+3i))$

We expand to get: $f(x)=(x^2-2x-15)(x^2+2x+10)$

We expand further to get:\

$f(x)=x^4-9x^2-50x-150$

3 0

3 years ago