Question

помогите пж только быстро​

Answer 1

Ответ:

Задание 1

(k+m)²=k²+2km+m²

(b-7)²=b²-14b+49

(5t+1)²=25t²+10t+1

(0.3m-4t)²=0.09m²-2.4mt+16t²

(n³+9a)²=n⁵+18an³+81a²

Задание 2

(2х-5)²+20х=4х²-10х+25+20х=4х²+10х+25

(t+2)(t-5)-(t+4)²=t²-5t+2t-10-t²-8t-16=-11t-26

Объяснение:

Answer 2

Ответ:

1.

1) (k + m)² = k² + 2km + m²

2) (b - 7)² = b² - 14b + 49

3) (5t + 1)² = 25t² + 10t + 1

4) (0.3m - 4t)² = 0.09m² - 2.4mt + 16t²

5) (n³ + 9a)² = n⁶ + 18an³ + 81a²

2.

1) (2x - 5)² + 20x = 4x² - 20x + 25 + 20x = 4х² + 25

2) (t + 2)(t - 5) - (t - 4)² = t² - 3t - 10 - t² + 8t - 16 = 5t - 26

3) 3(t + 2m)² - 12tm = 3(t² + 4tm + 4m²) - 12tm = 3t² + 12tm + 12m² - 12tm = 3t² + 12m²