Practice problem
Factor −x2+4x+77-x^{2}+4x+77−x2+4x+77 as −(x+m)(x−n)-(x+m)(x-n)−(x+m)(x−n), where mmm and nnn are positive numbers. What is m⋅nm \cdot nm⋅n?
−177-\dfrac{1}{77}−771
308308308
777777
444444
Type a concept, like “slope” or “photosynthesis”.
