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ГДЗ Алгебра 7 клас Тарасенкова (2024)
Роздiл 3. Одночлени i многочлени
.jpg?1732872200 "ГДЗ Алгебра 7 клас Тарасенкова (2024)")
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6) (2x – 1)2 – 25 = 0;
(2x – 1 – 5)(2x – 1 + 5) = 0;
(2x – 6)(2x + 4) = 0;
2x – 6 = 0; 2x = 6;
x = 3; 2x + 4 = 0;
2x = –4; x = –2.
7) x2 – (3 + х)2 = 0;
(x – 3 – x)(x + 3 + x) = 0;
–3(x + 3 + x) = 0;
–3x – 9 – 3x = 0;
–6x = 9; x = –1,5
(2x – 1 – 5)(2x – 1 + 5) = 0;
(2x – 6)(2x + 4) = 0;
2x – 6 = 0; 2x = 6;
x = 3; 2x + 4 = 0;
2x = –4; x = –2.
7) x2 – (3 + х)2 = 0;
(x – 3 – x)(x + 3 + x) = 0;
–3(x + 3 + x) = 0;
–3x – 9 – 3x = 0;
–6x = 9; x = –1,5