Identify Form: Identify the form of the quadratic trinomial.The given expression 25f2+40f+16 is a quadratic trinomial in the form of af2+bf+c.
Perfect Square Trinomial: Look for a perfect square trinomial.A perfect square trinomial is in the form (af+b)2=af2+2abf+b2. We need to check if the given trinomial fits this pattern.
Rewrite 25f2: Rewrite 25f2 in the form of (af)2.Since 52=25, we can write 25f2 as (5f)2.
Rewrite 16: Rewrite 16 in the form of b2.Since 42=16, we can write 16 as 42.
Determine a and b: Determine the values of a and b.From the previous steps, we have:a=5fb=4
Check Middle Term: Check if the middle term fits the pattern 2abf. Calculate 2ab to see if it equals the coefficient of the middle term (40). 2×5f×4=40f The middle term of the given trinomial is indeed 40f, which matches 2abf.
Write Factored Form: Write the factored form of the expression 25f2+40f+16. Since the trinomial fits the pattern of a perfect square, we can write it as (af+b)2. The factored form is (5f+4)2.