What number is 3 tens and 9 ones more than 42

Plz determine whether the polynomial is a difference of squares and if it is, factor it. y2 – 196 is a difference of squares: (y + 14)2 is a difference of squares: (y – 14)2 is a difference of squares: (y + 14)(y – 14) is not a difference of squares

Factor the polynomial. b^2 + 4b + 4

What is the value of x? enter your answer in the box. x =