Which binomial is a factor of 9x^2+ 24xy + 16y^2

How do you use the additive inverse to evaluate an expression that uses subtraction in a full sentence

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

The perimeter of a triangle is 69 cm. the first is 5 cm shorter than the second side. the third side is twice as long the first side. find the length of each side