Роздiл 3. Одночлени i многочлени » 518 (5-6)

5) (4 + 3х)2 – (6х – 2)2 = 0; (4 + 3х + 6х – 2)(4 + 3х – 6х + 2) = 0; (2 + 9х)(6 – 3х) = 0; 2 + 9х = 0; 9х = –2; х = –2/9; 6 – 3х = 0; 3х = 6; х = 2 6) (5х + 1)2 – (4х + 5)2 = 0. (5х + 1 + 4х + 5)(5х + 1 – 4х – 5) = 0; (9х + 6)(х – 4) = 0; 9х + 6 = 0; 9х = –6; х = –2/3; х – 4 = 0