Q. Rewrite the expression as a product of four linear factors:(3x2−7x)2−16(3x2−7x)+60Answer:
Identify Given Expression: Identify the given expression and recognize that it resembles a quadratic in form, where the variable part is (3x2−7x).The expression is: (3x2−7x)2−16(3x2−7x)+60
Transform to Quadratic Form: Notice that the expression can be considered as a quadratic equation in terms of (3x2−7x). Let's denote u=3x2−7x. The expression becomes:u2−16u+60
Factor Quadratic Expression: Factor the quadratic expression u2−16u+60. We are looking for two numbers that multiply to 60 and add up to −16. These numbers are −10 and −6. (u−10)(u−6)=u2−16u+60
Substitute Back for u: Substitute back 3x2−7x for u in the factored form.(3x2−7x−10)(3x2−7x−6)
Factor First Quadratic Expression: Now, factor each quadratic expression further into two linear factors. We start with 3x2−7x−10. We need to find two numbers that multiply to (3×−10)=−30 and add up to −7. These numbers are −10 and +3. (3x+3)(x−10)
Factor Second Quadratic Expression: Next, factor the second quadratic expression 3x2−7x−6. We need to find two numbers that multiply to (3×−6)=−18 and add up to −7. These numbers are −9 and +2. (3x+2)(x−3)
Combine Linear Factors: Combine all the linear factors to express the original expression as a product of four linear factors.(3x+3)(x−10)(3x+2)(x−3)
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