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Rewrite the expression as a product of four linear factors:

(x^(2)+7x)^(2)+4(x^(2)+7x)-96
Answer:

Rewrite the expression as a product of four linear factors:\newline(x2+7x)2+4(x2+7x)96 \left(x^{2}+7 x\right)^{2}+4\left(x^{2}+7 x\right)-96 \newlineAnswer:

Full solution

Q. Rewrite the expression as a product of four linear factors:\newline(x2+7x)2+4(x2+7x)96 \left(x^{2}+7 x\right)^{2}+4\left(x^{2}+7 x\right)-96 \newlineAnswer:
  1. Recognize Structure: Recognize the structure of the given expression The given expression resembles a quadratic in form, where the variable part (x2+7x)(x^2 + 7x) is squared and then linearly combined with a constant. This suggests that we might be able to factor it by treating (x2+7x)(x^2 + 7x) as a single variable.
  2. Substitute Single Variable: Substitute a single variable for the repeated expression\newlineLet y=x2+7xy = x^2 + 7x. The expression becomes y2+4y96y^2 + 4y - 96.
  3. Factor Quadratic Expression: Factor the quadratic expression in terms of yy We need to find two numbers that multiply to 96-96 and add to 44. These numbers are 1212 and 8-8. So, y2+4y96=(y+12)(y8)y^2 + 4y - 96 = (y + 12)(y - 8).
  4. Substitute Back: Substitute back x2+7xx^2 + 7x for yy\newlineReplace yy with x2+7xx^2 + 7x in the factored form to get:\newline(x2+7x+12)(x2+7x8)(x^2 + 7x + 12)(x^2 + 7x - 8).
  5. Factor Each Quadratic: Factor each quadratic separately\newlineWe now have two quadratics to factor. We need to find two numbers that multiply to 1212 and add to 77 for the first quadratic, and two numbers that multiply to 8-8 and add to 77 for the second quadratic.\newlineFor the first quadratic: The numbers are 33 and 44.\newlineSo, x2+7x+12=(x+3)(x+4)x^2 + 7x + 12 = (x + 3)(x + 4).\newlineFor the second quadratic: The numbers are 11 and 8-8.\newlineSo, x2+7x8=(x+8)(x1)x^2 + 7x - 8 = (x + 8)(x - 1).
  6. Combine Factors: Combine the factors to express the original expression as a product of four linear factors\newlineThe original expression is now factored as:\newline(x+3)(x+4)(x+8)(x1)(x + 3)(x + 4)(x + 8)(x - 1).

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