Identify Coefficients: Identify the coefficients of the quadratic expression.The quadratic expression is z2+13z+22. Here, the coefficient of z2(a) is 1, the coefficient of z(b) is 13, and the constant term (c) is 22.
Find Two Numbers: Find two numbers that multiply to give the constant term c and add up to the coefficient of z (b).We need to find two numbers whose product is 22 (the constant term) and whose sum is 13 (the coefficient of z). The numbers 2 and 11 satisfy these conditions because 2×11=22 and 2+11=13.
Write Factored Form: Write the factored form using the two numbers found in the previous step.The factored form of the quadratic expression z2+13z+22 is (z+2)(z+11), since these factors will multiply out to the original quadratic expression.