Question

Представьте в виде произведения двучлен: 1)c²-0,49 2)16-k² 3)400-m² 4)t²-225 5)1,69-b² 6)y²-16/81 7)25x2-4 8)25/36-64y²

Answer 1

Ответ:

Объяснение:

1)c²-0,49 =(с-0.7)(с+0.7)

2)16-k² =(4-k)(4+k)

3)400-m² =(20-m)(20+m)

4)t²-225 =(t-15)(t+15)

5)1,69-b² =(1.3-b)(1.3+b)

6)y²-16/81 =(y-4/9)(y+4/9)

7)25x^2-4=(5x-2)(5x+2)

8)25/36-64y(5/6-8y)(5/6+8y)

Answer 2

1. $c^2 - 0.49$ can be written as $(c + 0.7)(c - 0.7)$.
2. $16 - k^2$ can be written as $(4 + k)(4 - k)$.
3. $400 - m^2$ can be written as $(20 + m)(20 - m)$.
4. $t^2 - 225$ can be written as $(t + 15)(t - 15)$.
5. $1.69 - b^2$ can be written as $(1.3 + b)(1.3 - b)$.
6. $y^2 - \frac{16}{81}$ can be written as $\left(y + \frac{4}{9}\right)\left(y - \frac{4}{9}\right)$.
7. $25x^2 - 4$ can be written as $(5x + 2)(5x - 2)$.
8. $\frac{25}{36} - 64y^2$ can be written as $\left(\frac{5}{6} - 8y\right)\left(\frac{5}{6} + 8y\right)$.