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ГДЗ Алгебра 7 клас Тарасенкова (2024)
Роздiл 3. Одночлени i многочлени
Виконайте множення:
1) (n + m) • (n + m) = n2 + nm + nm + m2 = n2 + 2nm + m2;
2) (8 + x) • (x – 5) = 8x – 40 + x2 – 5x = x2 + 3x – 40;
3) (x + 4) • (–x + 6) = –x2 + 6x – 4x + 24 = –x2 + 2x + 24;
4) (2x + 1) • (Зx – 4) = 6x2 – 8x + 3x – 4 = 6x2 – 5x – 4;
5) (2а + х) • (2x + а) = 4ax + 2a2 + 2x2 + ax = 2a2 + 2x2 + 5ax;
6) (x2 + 5y2) • (у2 – х2) = x2y2 – x4 + 5y4 – 5x2y2 = –x4 + 5y4 – 4x2y2.
1) (n + m) • (n + m) = n2 + nm + nm + m2 = n2 + 2nm + m2;
2) (8 + x) • (x – 5) = 8x – 40 + x2 – 5x = x2 + 3x – 40;
3) (x + 4) • (–x + 6) = –x2 + 6x – 4x + 24 = –x2 + 2x + 24;
4) (2x + 1) • (Зx – 4) = 6x2 – 8x + 3x – 4 = 6x2 – 5x – 4;
5) (2а + х) • (2x + а) = 4ax + 2a2 + 2x2 + ax = 2a2 + 2x2 + 5ax;
6) (x2 + 5y2) • (у2 – х2) = x2y2 – x4 + 5y4 – 5x2y2 = –x4 + 5y4 – 4x2y2.