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Rewrite the expression as a product of four linear factors:

(x^(2)+2x)^(2)-18(x^(2)+2x)+45
Answer:

Rewrite the expression as a product of four linear factors:\newline(x2+2x)218(x2+2x)+45 \left(x^{2}+2 x\right)^{2}-18\left(x^{2}+2 x\right)+45 \newlineAnswer:

Full solution

Q. Rewrite the expression as a product of four linear factors:\newline(x2+2x)218(x2+2x)+45 \left(x^{2}+2 x\right)^{2}-18\left(x^{2}+2 x\right)+45 \newlineAnswer:
  1. Identify Expression: Let's first identify the expression we need to factor:\newline(x2+2x)218(x2+2x)+45(x^{2}+2x)^{2}-18(x^{2}+2x)+45\newlineWe recognize this as a quadratic in form, where the variable part is (x2+2x)(x^2 + 2x). Let's set u=x2+2xu = x^2 + 2x to simplify our expression.\newlineOur expression becomes:\newlineu218u+45u^2 - 18u + 45\newlineNow we need to factor this quadratic expression.
  2. Set Variable: We look for two numbers that multiply to 4545 and add up to 18-18. These numbers are 15-15 and 3-3. So we can write our quadratic as: (u15)(u3)(u - 15)(u - 3)
  3. Factor Quadratic: Now we substitute back x2+2xx^2 + 2x for uu to get:\newline(x2+2x15)(x2+2x3)(x^2 + 2x - 15)(x^2 + 2x - 3)
  4. Find Two Numbers: Next, we need to factor each quadratic. Starting with x2+2x15x^2 + 2x - 15, we look for two numbers that multiply to 15-15 and add up to 22. These numbers are 55 and 3-3. So we can write x2+2x15x^2 + 2x - 15 as: (x+5)(x3)(x + 5)(x - 3)
  5. Substitute Back: Now we factor x2+2x3x^2 + 2x - 3. We look for two numbers that multiply to 3-3 and add up to 22. These numbers are 33 and 1-1. So we can write x2+2x3x^2 + 2x - 3 as: (x+3)(x1)(x + 3)(x - 1)
  6. Factor x2+2x15x^2 + 2x - 15: Finally, we combine all the factors to express the original expression as a product of four linear factors:\newline(x+5)(x3)(x+3)(x1)(x + 5)(x - 3)(x + 3)(x - 1)

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