Identify Quadratic Trinomial: Identify the quadratic trinomial and check if there is a common factor for all terms.11x2−198x−120Check for common factors:GCD(11, 198, 120) = 11
Factor Out GCD: Factor out the greatest common divisor (GCD) from the quadratic trinomial. 11(x2−18x−11)
Find Two Numbers: Now, we need to factor the quadratic expression inside the parentheses. Look for two numbers that multiply to −11 (the product of the coefficient of x2 and the constant term) and add up to −18 (the coefficient of x).The numbers that satisfy these conditions are −22 and +1.
Rewrite Middle Term: Rewrite the middle term −18x using the two numbers found in the previous step.11(x2−22x+x−11)
Group and Factor: Group the terms in pairs and factor by grouping. 11((x2−22x)+(x−11))
Factor Common Factors: Factor out the common factors from each group. 11(x(x−22)+1(x−11))
Re-evaluate Factors: Notice that (x−22) and (x−11) are not common factors, and we cannot factor further. This indicates a mistake was made in the previous steps because the quadratic should be factorable. We need to re-evaluate the factors of −11 that add up to −18.