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timofeeve [1]
3 years ago
6

Midpoints B is the midpoint of AC , find x.

Mathematics
2 answers:
Oksana_A [137]3 years ago
5 0
<h3><u>Given</u>:- </h3>

\red{➤}\:\sf AB = 5x

\red{➤}\:\sf BC = 3x+4

\\

<h3><u>To Find:-</u></h3>

\orange{☛}\:\sf Value  \:of  \:x

\\

<h3><u>Solution</u>:-</h3>

Since B is midpoint of AC, therefore -

\\\quad\quad\quad\quad\sf AB = BC

\begin{gathered}\\\quad\longrightarrow\quad \sf 5x = 3x+4\quad\quad ( Putting \:Value) \\\end{gathered}

\begin{gathered}\\\quad\longrightarrow\quad\sf 5x-3x =4 \\\end{gathered}

\begin{gathered}\\\quad\longrightarrow\quad\sf 2x =4 \\\end{gathered}

\begin{gathered}\\\quad\longrightarrow\quad\sf x =\frac{4}{2}\\\end{gathered}

\begin{gathered}\\\quad\longrightarrow\quad\boxed{\sf {x=2 }}\\\end{gathered}

PolarNik [594]3 years ago
4 0

B is the midpoint which means both sides are equal to each other:

5x = 3x + 4

Subtract 3x from both sides

2x = 4

Divide both sides by 2

X = 2

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2. Andrew made an error in determining the polynomial equation of smallest degree whose roots are 3, 2+2i and 2-2i.
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The polynomial equation for the given roots is x³-7x²+20x-24=0.

Given that, the polynomial equation of the smallest degree whose roots are 3, 2+2i and 2-2i.

Now, we need to write the polynomial equation.

<h3>What is a polynomial equation? </h3>

A polynomial equation is an equation where a polynomial is set equal to zero. i.e., it is an equation formed with variables, non-negative integer exponents, and coefficients together with operations and an equal sign. It has different exponents. The highest one gives the degree of the equation. For an equation to be a polynomial equation, the variable in it should have only non-negative integer exponents. i.e., the exponents of variables should be only non-negative and they should neither be negative nor be fractions.

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So, the polynomial equation is (x-3)(x-2-2i)(x-2+2i)=0

⇒(x-3)(x(x-2-2i)-2(x-2-2i)+2i(x-2-2i))=0

⇒(x-3)(x²-2x-2xi-2x+4+4i+2xi-4i-4i²)=0

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Therefore, the polynomial equation for the given roots is x³-7x²+20x-24=0.

To learn more about the polynomial equation visit:

brainly.com/question/20630027.

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