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Rewrite the expression as a product of four linear factors:

(7x^(2)+15 x)^(2)-16(7x^(2)+15 x)-36
Answer:

Rewrite the expression as a product of four linear factors:\newline(7x2+15x)216(7x2+15x)36 \left(7 x^{2}+15 x\right)^{2}-16\left(7 x^{2}+15 x\right)-36 \newlineAnswer:

Full solution

Q. Rewrite the expression as a product of four linear factors:\newline(7x2+15x)216(7x2+15x)36 \left(7 x^{2}+15 x\right)^{2}-16\left(7 x^{2}+15 x\right)-36 \newlineAnswer:
  1. Identify Expression Form: Identify the given expression and recognize that it resembles a quadratic in form, where the variable part is (7x2+15x)(7x^2 + 15x). The expression is: (7x2+15x)216(7x2+15x)36(7x^2 + 15x)^2 - 16(7x^2 + 15x) - 36 Let's denote u=7x2+15xu = 7x^2 + 15x, so the expression becomes: u216u36u^2 - 16u - 36
  2. Denote Variable: Now, we need to factor the quadratic expression u216u36u^2 - 16u - 36. We are looking for two numbers that multiply to 36-36 and add up to 16-16. These numbers are 18-18 and +2+2. So we can write the quadratic as: (u18)(u+2)(u - 18)(u + 2)
  3. Factor Quadratic Expression: Substitute back 7x2+15x7x^2 + 15x for uu in the factored form to get: (7x2+15x18)(7x2+15x+2)(7x^2 + 15x - 18)(7x^2 + 15x + 2)
  4. Substitute Variable Back: Now, we need to factor each quadratic expression further. We start with 7x2+15x187x^2 + 15x - 18. We look for two numbers that multiply to 7×18=1267 \times -18 = -126 and add up to 1515. These numbers are 2121 and 6-6. So we can write the quadratic as: (7x6)(x+3)(7x - 6)(x + 3)
  5. Factor First Quadratic: Next, we factor 7x2+15x+27x^2 + 15x + 2. We look for two numbers that multiply to 7×2=147 \times 2 = 14 and add up to 1515. These numbers are 1414 and 11. So we can write the quadratic as: (7x+1)(x+2)(7x + 1)(x + 2)
  6. Factor Second Quadratic: Combine all the linear factors to express the original expression as a product of four linear factors:\newline(7x6)(x+3)(7x+1)(x+2)(7x - 6)(x + 3)(7x + 1)(x + 2)

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