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Rewrite the expression as a product of four linear factors:

(x^(2)+3x)^(2)-16(x^(2)+3x)-36
Answer:

Rewrite the expression as a product of four linear factors:\newline(x2+3x)216(x2+3x)36 \left(x^{2}+3 x\right)^{2}-16\left(x^{2}+3 x\right)-36 \newlineAnswer:

Full solution

Q. Rewrite the expression as a product of four linear factors:\newline(x2+3x)216(x2+3x)36 \left(x^{2}+3 x\right)^{2}-16\left(x^{2}+3 x\right)-36 \newlineAnswer:
  1. Identify Expression: Let's first identify the expression we need to factor:\newlineExpression: (x2+3x)216(x2+3x)36(x^2 + 3x)^2 - 16(x^2 + 3x) - 36\newlineWe notice that this is a quadratic in form, where the variable part (x2+3x)(x^2 + 3x) is squared and appears linearly as well. We can use a substitution method to simplify the factoring process.\newlineLet u=x2+3xu = x^2 + 3x. Then our expression becomes:\newlineu216u36u^2 - 16u - 36
  2. Factor Quadratic Expression: Now we need to factor the quadratic expression u216u36u^2 - 16u - 36. This is a standard quadratic factoring problem.\newlineWe look for two numbers that multiply to 36-36 and add up to 16-16. These numbers are 18-18 and +2+2.\newlineSo we can write the quadratic as:\newline(u18)(u+2)(u - 18)(u + 2)
  3. Substitute and Simplify: Next, we substitute back x2+3xx^2 + 3x for uu to get the expression in terms of xx: \newline(x2+3x18)(x2+3x+2)(x^2 + 3x - 18)(x^2 + 3x + 2)\newlineNow we need to factor each of these quadratic expressions further.
  4. Factor First Quadratic: We start with the first quadratic expression x2+3x18x^2 + 3x - 18. We need to find two numbers that multiply to 18-18 and add up to 33. These numbers are 66 and 3-3. So we can write the quadratic as: (x+6)(x3)(x + 6)(x - 3)
  5. Factor Second Quadratic: Now we factor the second quadratic expression x2+3x+2x^2 + 3x + 2. We need to find two numbers that multiply to 22 and add up to 33. These numbers are 22 and 11.\newlineSo we can write the quadratic as:\newline(x+2)(x+1)(x + 2)(x + 1)
  6. Combine Factors: Finally, we write the original expression as a product of four linear factors by combining the factors we found: \newline(x+6)(x3)(x+2)(x+1)(x + 6)(x - 3)(x + 2)(x + 1)\newlineThis is the expression rewritten as a product of four linear factors.

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