Q. Rewrite the expression as a product of four linear factors:(x2+8x)2+19(x2+8x)+84Answer:
Identify Expression: Let's first identify the expression we need to factor:The expression is (x2+8x)2+19(x2+8x)+84.We can notice that this is a quadratic in form, where the variable part (x2+8x) is squared and then linearly added with a constant. Let's denote u=x2+8x, so the expression becomes u2+19u+84.
Factor Quadratic Expression: Now we need to factor the quadratic expression u2+19u+84. To do this, we look for two numbers that multiply to 84 and add up to 19. These numbers are 7 and 12. So we can write u2+19u+84 as (u+7)(u+12).
Substitute Back and Simplify: Now we substitute back x2+8x for u to get the factored form in terms of x: (u+7)(u+12) becomes (x2+8x+7)(x2+8x+12).
Factor x2+8x+7: Next, we need to factor each of these quadratic expressions further. Starting with x2+8x+7, we look for two numbers that multiply to 7 and add up to 8. These numbers are 7 and 1. So we can write x2+8x+7 as (x+7)(x+1).
Factor x2+8x+12: Now we factor x2+8x+12. We look for two numbers that multiply to 12 and add up to 8. These numbers are 6 and 2. So we can write x2+8x+12 as (x+6)(x+2).
Combine Linear Factors: Finally, we combine all the linear factors to express the original expression as a product of four linear factors: x + \(7)(x + 1)(x + 6)(x + 2)\.
More problems from Evaluate definite integrals using the power rule