Question

алгебра 7 класс, срочно!!!! ​

Answer 1

Ответ:

#2:

1. (с-10)² = с²-10с+100

2. (11х+4)² = 121х²+44х+16

3. (6+2у)² = 36+12у+4у²

4. (4k-3)² = 16k²-12k+9

5. (3c+2d)² = 9c²+6cd+4d²

6. (8x-3y)² = 64х²-24ху+9у²

7. (3а-5в)² = 9а²-15ав+25в²

8. (7c-2m)² = 49c²-14cm+4m²

9. (в+8)² = в²+8в+64

10. (12h+2)² = 144h²+24h+4

11. (5-2у)² = 25-10у+4у²

12. (3k-4) ² = 9k²-12k+16

#3:

${(14a + \frac{1}{7} )}^{2} = {(14a)}^{2} +(2 \times 14a \times \frac{1}{7}) + {( \frac{1}{7} )}^{2} = 196 {a}^{2} + 4a + \frac{1}{49}$

#4:

1. 49-84у+36у² = (7-6у)²

2. 25а²+100ad+100d² = (5а+10d)²

3. 4m²-28m+49 = (2m+7)²