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Rewrite the expression as a product of four linear factors:

(5x^(2)-9x)^(2)-16(5x^(2)-9x)+28
Answer:

Rewrite the expression as a product of four linear factors:\newline(5x29x)216(5x29x)+28 \left(5 x^{2}-9 x\right)^{2}-16\left(5 x^{2}-9 x\right)+28 \newlineAnswer:

Full solution

Q. Rewrite the expression as a product of four linear factors:\newline(5x29x)216(5x29x)+28 \left(5 x^{2}-9 x\right)^{2}-16\left(5 x^{2}-9 x\right)+28 \newlineAnswer:
  1. Identify Expression: Identify the given expression and recognize that it resembles a quadratic in form, where the variable part is (5x29x)(5x^2 - 9x).\newlineThe expression is: (5x29x)216(5x29x)+28(5x^2 - 9x)^2 - 16(5x^2 - 9x) + 28
  2. Set Substitution: Let's set a substitution to simplify the expression. Let u=5x29xu = 5x^2 - 9x. The expression then becomes:\newlineu216u+28u^2 - 16u + 28\newlineThis is a quadratic equation in terms of uu.
  3. Factor Quadratic Equation: Factor the quadratic equation u216u+28u^2 - 16u + 28. We are looking for two numbers that multiply to 2828 and add up to 16-16. These numbers are 14-14 and 2-2. So, the factored form is (u14)(u2)(u - 14)(u - 2).
  4. Substitute Back: Now, substitute back 5x29x5x^2 - 9x for uu in the factored expression to get: (5x29x14)(5x29x2)(5x^2 - 9x - 14)(5x^2 - 9x - 2)
  5. Factor First Quadratic: Each quadratic factor can be further factored into two linear factors. We will start with the first quadratic factor 5x29x145x^2 - 9x - 14. We need to find two numbers that multiply to (5×14)=70(5 \times -14) = -70 and add up to 9-9. These numbers are 14-14 and 55. So, the factored form is (5x+5)(x14)(5x + 5)(x - 14).
  6. Factor Second Quadratic: Now, factor the second quadratic factor 5x29x25x^2 - 9x - 2. We need to find two numbers that multiply to (5×2)=10(5 \times -2) = -10 and add up to 9-9. These numbers are 10-10 and 11. So, the factored form is (5x+1)(x2)(5x + 1)(x - 2).
  7. Combine Linear Factors: Combine the linear factors from both quadratic factors to express the original expression as a product of four linear factors:\newline(5x+5)(x14)(5x+1)(x2)(5x + 5)(x - 14)(5x + 1)(x - 2)

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