Math Problem Statement

Fine the quotient

Find the quotient of the following polynomial division problems.

Solution

Let's work through the division problems in your image. Each problem requires finding the quotient, so I'll go step-by-step.

Problem 45:

12+2x3x2=3x+212 + 2x - 3x^2 = 3x + 2 To simplify this, we rearrange the terms: 12+2x3x23x2=012 + 2x - 3x^2 - 3x - 2 = 0 Combine like terms: 3x2x+10=0-3x^2 - x + 10 = 0 This is a quadratic equation, so the quotient in terms of finding the roots would be solved using the quadratic formula.

Problem 46:

y36y+5=y2+3y2y^3 - 6y + 5 = y^2 + 3y - 2 Rearrange terms: y3y29y+7=0y^3 - y^2 - 9y + 7 = 0 This is a cubic equation. Factoring or solving with methods specific to cubic equations will give us the quotient.

Problem 50:

2x3+4x25x2+3\frac{2x^3 + 4x^2 - 5}{x^2 + 3} This is polynomial division. Perform long division of the polynomials:

  • Divide the first term 2x3÷x2=2x2x^3 \div x^2 = 2x,
  • Multiply 2x(x2+3)=2x3+6x2x(x^2 + 3) = 2x^3 + 6x,
  • Subtract: (2x3+4x25)(2x3+6x)=4x26x5(2x^3 + 4x^2 - 5) - (2x^3 + 6x) = 4x^2 - 6x - 5.

Now divide 4x2÷x2=44x^2 \div x^2 = 4,

  • Multiply 4(x2+3)=4x2+124(x^2 + 3) = 4x^2 + 12,
  • Subtract: 4x26x5(4x2+12)=6x174x^2 - 6x - 5 - (4x^2 + 12) = -6x - 17.

So, the quotient is 2x+42x + 4 with a remainder of 6x17-6x - 17.

Problem 51:

x827x3\frac{x^8 - 27}{x - 3} Notice that x827x^8 - 27 resembles a difference of cubes a3b3=(ab)(a2+ab+b2)a^3 - b^3 = (a - b)(a^2 + ab + b^2), but here it's x8x^8 and not cubed. To solve this, polynomial long division would be necessary.

Problem 53:

4x22xy3y22x+3y\frac{4x^2 - 2xy - 3y^2}{2x + 3y} Long division must be applied here. This quotient involves dividing a quadratic polynomial by a linear binomial.

Problem 54:

a4+16a+2\frac{a^4 + 16}{a + 2} To divide, first check if a4+16a^4 + 16 can be factored. Since a4+16a^4 + 16 doesn't factor nicely, long division must be used.

Problem 56:

x5+y5x+y\frac{x^5 + y^5}{x + y} This is a known identity for the sum of powers: x5+y5=(x+y)(x4x3y+x2y2xy3+y4)x^5 + y^5 = (x + y)(x^4 - x^3y + x^2y^2 - xy^3 + y^4) So, the quotient is: x4x3y+x2y2xy3+y4x^4 - x^3y + x^2y^2 - xy^3 + y^4

Would you like further details on any of these problems? Let me know if you have any questions!

5 Related Questions:

  1. How do you factor higher-degree polynomials efficiently?
  2. What is the difference between long division and synthetic division in polynomials?
  3. How do you solve a cubic equation like the one in problem 46?
  4. What are the common tricks to recognize factorizations in polynomial expressions?
  5. How do you handle remainders in polynomial division?

Tip:

Always check if a polynomial can be factored before applying long division, as it can significantly simplify the process!

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Math Problem Analysis

Mathematical Concepts

Polynomial division
Factoring
Cubic equations
Quadratic equations
Sum of powers

Formulas

Quadratic formula: x = [-b ± √(b² - 4ac)] / 2a
Difference of cubes: a³ - b³ = (a - b)(a² + ab + b²)
Sum of fifth powers: x⁵ + y⁵ = (x + y)(x⁴ - x³y + x²y² - xy³ + y⁴)

Theorems

Polynomial Long Division
Factorization Theorem

Suitable Grade Level

Grades 9-12