Recognize and Determine Factoring Strategy: Recognize the type of polynomial and determine the factoring strategy.The given polynomial is a quadratic in the form of ax2+bx+c. We can attempt to factor it by finding two numbers that multiply to ac (the product of the coefficient of x2 and the constant term) and add up to b (the coefficient of x).
Identify Coefficients: Identify the coefficients a, b, and c in the quadratic expression 2x2−32x+128.a=2, b=−32, c=128
Find Multiplying and Adding Numbers: Find two numbers that multiply to ac (2×128=256) and add up to b (−32).The two numbers that satisfy these conditions are −16 and −16, since (−16)×(−16)=256 and (−16)+(−16)=−32.
Rewrite Middle Term: Rewrite the middle term −32x using the two numbers found in Step 3.2x2−32x+128=2x2−16x−16x+128
Factor by Grouping: Factor by grouping.Group the terms into two pairs: (2x2−16x) and (−16x+128).Factor out the greatest common factor from each pair.2x(x−8)−16(x−8)
Factor out Common Binomial Factor: Factor out the common binomial factor (x−8).(2x−16)(x−8)
Further Factor 2x−16: Recognize that 2x−16 can be further factored by taking out the common factor of 2.2(x−8)(x−8)
Write Final Factored Form: Write the final factored form.The factored form of the expression is 2(x−8)2.
More problems from Factor quadratics: special cases