RELAZIONI E FUNZIONI 213 3( 2x2 + 1) = 2(x2 5) [ ] 2 4 214 __(x + 1)(2 x) = __ [0; 1] 215 (3x + 2)(3x 2) + 3 = 0 [ 3 ] 3 3 _1_ __ 1 2 216 __(x + 1)2 = (x + 3) [ 5 ] 217 ( 2x + 3)(5x + 1) = 0 [ 5 ; 2 ] 218 6x2 + 5x 6 = 0 [ 2 ; 3 ] 225 (6x 3)(2x 6) = 0 226 _1_ _1_ (3 x 0,5)(x + 3) = 0 [ 4 ; 3] 220 x2 5x + 4 = 0 [1; 4] _1_ 221 4x2 5x + 1 = 0 [ 4 ; 1] 222 5x2 16x + 3 = 0 [ 5 ; 3] _1_ _1_ _3_ 223 3x2 2x + 2 = 0 [ ] _3_ _2_ 224 2x2 3x 5 = 0 [ 1; 2 ] (3 2x)(x + 4) = 0 _5_ _1_ _3_ [ 2 ; 3]; [ 2 ; 4] _5_ (x 3)x = 0 227 x2 5x = 4 x2 5x + 6 = 0 228 x2 + 99x 100 = 0 y2 14y + 49 = 0 229 2x2 x 3 = 0 16x2 = 24x 3 230 10x2 20x + 10 = 0 30x2 + 323x + 84 = 0 231 20x + 96 = 25x2 27x2 30x + 77 = 0 232 5x2 + 9x 14 = 0 3x2 5x + 2 = 0 233 12x2 + 17x + 6 = 0 24x2 5x 14 = 0 1 5 234 __x2 + __x 2 = 0 _1_ 219 4x2 11x 3 = 0 [1; 4]; [ 6; 1] 21 4 [1; 1]; [ ___; ___] 2 15 [ 6; 1] 3 3 3 235 ___x2 + x 2 = 0 25 [ 10; 3 ] 236 16x2 + 8x 3 = 0 [ 4 ; 4 ] 237 25x2 20x 96 = 0 238 2x2 5x 3 = 0 _5_ 1 _3_ __ 12 _8_ ___ [ 5 ; 5 ] _1_ [3; 2 ] 37 ___ 239 17x2 14x 111 = 0 [ 17 ; 3] 240 5x2 + 9x 38 = 0 [ 5 ; 2] 19 ___ _3_ _2_ 241 12x2 + 17x + 6 = 0 [ 4 ; 3 ] 242 x2 + 4x + 1 = 0 [ 2 3 ] 190 __