What is the expression in factored form
x^2+13x+42

What is sin 7x/4 ? i need on this urgent trig

What is the reflection image of (5,-3) across the line y = -x?

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