REMEDIAL LESSON 3 ADDITION, SUBTRACTION, MULTIPLICATION, AND DIVISION OF ALGEBRAIC EXPRESSION 1.) 3x³ + 8x²-9x-12-10x³-9x²-18x -7 note. Laws of exponent 2.) 7x²y² (7xy + 5) am (an) 3.) (x + 9) (x-9) 4.) (x+3) (2x² + 4x + 8) 5.) (x²+5x+7) (2x² + 4x + 6) 6.) 7.) 8.) 9.) 72x² 8x² 48m²n³ 6 m²n4 3x²-4x -4 3x+1 (4y³+ 5y² + 6y) 2y 10.) 7x²+14x x+2 am an = am+n = am-n​