## Algebra: A Combined Approach (4th Edition)

$49x^{2}-14x+1$
Step 1: Using the special product, $(7x-1)^{2}=(7x)^{2}+2(7x)(-1)+(1)^{2}$ Step 2: $(7x)^{2}+2(7x)(-1)+(1)^{2}=49x^{2}-14x+1$