What is the common factor of 128 and 49?

Me find the measure to side a and the process to solve the problem you appreciate it : )

Problem melissa is her dad build a walkway in their backyard. the walkway will be 54 feet long and 1.5 feet wide. the local hardware store sells tiles which are 1.5 by 1.5 feet and come in boxes of 12. how many boxes of tiles do they need?

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x