How to write the polynomial given complex roots

How to write the polynomial given complex roots

Assessment

Interactive Video

Mathematics

11th Grade - University

Hard

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The video tutorial explains how to create a polynomial with integer coefficients by working backwards from given solutions. It covers the importance of complex conjugates, the zero product property, and the difference of two squares. The tutorial also demonstrates evaluating and simplifying expressions to derive the final polynomial using techniques like the box method.

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7 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main goal when working backwards from given solutions in polynomial construction?

To find the x-intercepts of the polynomial

To create a polynomial with integer coefficients

To determine the degree of the polynomial

To simplify the polynomial expression

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is it important to consider complex conjugates when given complex solutions?

They simplify the polynomial

They ensure all solutions are real

They must exist for the polynomial to have real coefficients

They reduce the degree of the polynomial

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What property is applied to set the solutions equal to zero in polynomial construction?

Commutative Property

Distributive Property

Associative Property

Zero Product Property

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What technique is used to simplify the expression involving terms like (x - 2 - i) and (x - 2 + i)?

Binomial Expansion

Quadratic Formula

Difference of Two Squares

Sum of Cubes

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the result of squaring a binomial like (x - 2)?

x^2 - 2x + 2

x^2 + 4

x^2 - 4

x^2 - 4x + 4

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which method is recommended for organizing terms when expanding a polynomial?

Box Method

Long Division

Synthetic Division

FOIL Method

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the final polynomial expression obtained in the video?

y = x^3 - 7x^2 + 15x - 17

y = x^3 + 7x^2 - 17x + 15

y = x^3 - 7x^2 + 17x - 15

y = x^3 + x^2 - 7x + 15