### Algebra

1. Multiply (2-5x⁷)² =_____ 2. The base of a triangle is 4 cm greater than the height. The area is 30 cm². Find the height and length of the base. Height is ________cm Base is _________cm 3. (y²-7) (6y²-3y+5) =_______ 4. Find the greatest common factor (GCF) of 12x and 14x³ The GCF is_____________