Q. Rewrite the expression as a product of four linear factors:(x2−6x)2−11(x2−6x)−80Answer:
Denote and Substitute: Let's denote u=x2−6x. We can then rewrite the given expression in terms of u to simplify the problem.Substitute u into the expression: (u)2−11u−80.
Factor Quadratic: Now we have a quadratic in terms of u: u2−11u−80. We need to factor this quadratic.To factor u2−11u−80, we look for two numbers that multiply to −80 and add up to −11. These numbers are −16 and 5.So, u2−11u−80 factors into (u−16)(u+5).
Substitute Back and Factor: Now we substitute back x2−6x for u in the factored form.We get (x2−6x−16)(x2−6x+5).
Factor Quadratics Separately: Next, we need to factor each quadratic separately.Starting with x2−6x−16, we look for two numbers that multiply to −16 and add up to −6. These numbers are −8 and 2.So, x2−6x−16 factors into (x−8)(x+2).
Factor Second Quadratic: Now, we factor x2−6x+5. We look for two numbers that multiply to 5 and add up to −6. These numbers are −5 and −1.So, x2−6x+5 factors into (x−5)(x−1).
Write Original Expression: Finally, we write the original expression as a product of four linear factors using the factors we found.The expression (x2−6x)2−11(x2−6x)−80 can be rewritten as (x−8)(x+2)(x−5)(x−1).