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Factor the following expression completely.

x^(4)+3x^(3)+2x^(2)-16x^(2)-48 x-32
Answer:

Factor the following expression completely.\newlinex4+3x3+2x216x248x32 x^{4}+3 x^{3}+2 x^{2}-16 x^{2}-48 x-32 \newlineAnswer:

Full solution

Q. Factor the following expression completely.\newlinex4+3x3+2x216x248x32 x^{4}+3 x^{3}+2 x^{2}-16 x^{2}-48 x-32 \newlineAnswer:
  1. Group Terms Together: Group similar terms together to make factoring easier.\newlineWe can group the terms as follows: (x4+3x3+2x2)(16x2+48x+32)(x^4 + 3x^3 + 2x^2) - (16x^2 + 48x + 32).
  2. Factor Out Common Factors: Factor out the greatest common factor from each group.\newlineIn the first group, x2x^2 is the greatest common factor, and in the second group, 1616 is the greatest common factor. So we get:\newlinex2(x2+3x+2)16(x2+3x+2)x^2(x^2 + 3x + 2) - 16(x^2 + 3x + 2).
  3. Recognize Same Quadratic Expressions: Notice that the quadratic expressions in both groups are the same.\newlineSince both groups contain the same quadratic expression (x2+3x+2)(x^2 + 3x + 2), we can factor it out:\newline(x216)(x2+3x+2)(x^2 - 16)(x^2 + 3x + 2).
  4. Factor Difference of Squares: Factor the difference of squares in the first term.\newlineThe expression x216x^2 - 16 is a difference of squares and can be factored as (x+4)(x4)(x + 4)(x - 4).
  5. Factor Quadratic Expression: Factor the quadratic expression in the second term.\newlineThe quadratic expression x2+3x+2x^2 + 3x + 2 can be factored into (x+1)(x+2)(x + 1)(x + 2) because 11 and 22 are the numbers that add up to 33 (the coefficient of xx) and multiply to 22 (the constant term).
  6. Write Fully Factored Expression: Write the fully factored expression.\newlineCombining the factors from steps 44 and 55, we get the final factored expression:\newline(x+4)(x4)(x+1)(x+2)(x + 4)(x - 4)(x + 1)(x + 2).

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