Subtract the following polynomials a) -3ab - 7ab c) (3x - 5y²-5)-(-6x + 2y² + 3) e) (6x + 8y-z) - (5x - 2y-z) g) (3x²-5x + 7)-(5x²-2x-1) How much is -8x less than 12x? b) (-u²-v) - (9u² + 4v) d) (x² - 5x +9) - (-10x² + 3x - 2) f) (7-2)-(8x²-8y) h) (7a³ + 9a-1)-(2a³-5a + 9) How much is 4v + z greater than 7v - 2z? What should be added to 21² - m² + n² to get l² + m²-n²? 6 Subtract a² + b² + c² from 4a² + 2b²-3c² and add the result into 5a² - 6b². 7 Subtract x - 5y-z from the sum of 2x -y + z and x + y - 5z. 8 The sum of two expressions is 5u² + 2uv - v². If one of them is 2u² + 3v¹, find the other. Subtract 2x³y - 3y2 from 3x² - 5x²y + 2y' and subtract the result from the sum of the two expressions 3xy' + 5y² - 2x'y and x³y + 5x²-3xy'. 10 If A = x²-xy + z, B = 3x² + 4xy +4z, C = 7x² - 6xy-7z then find; b) A - B c) A + C e) A - B + C f) A - B - C a) A + B d) A + B-C
