Question

What is the factored form of 49x^2 – 56x + 16?

Answer 1

the main formula is  (a - b)² = a² -2ab + b²
as for 49x^2 – 56x + 16, it is the same of (7x -4)²
so the the factored form of 49x^2 – 56x + 16 = (7x -4)(7x -4)