Recognize Quadratic Form: Recognize the quadratic as a perfect square trinomial, where a2−2ab+b2=(a−b)2.
Identify a and b: Identify a2 as 4f2, which means a=2f.
Write in (a−b)2 Form: Identify b2 as 1, which means b=1.
Check Middle Term: Write the expression in the form (a−b)2.(2f−1)2=4f2−4f+1.
Check Middle Term: Write the expression in the form (a−b)2.(2f−1)2=4f2−4f+1.Check the middle term to ensure it's −2ab.−2×2f×1=−4f, which matches the middle term of the original expression.
More problems from Factor quadratics: special cases