Question

упростите (5х+2) в кубе
Плиииз​

Answer 1

Ответ:

${(5x + 2)}^{3} = {(5x)}^{3} + 3 \times {(5x)}^{2} \times 2 + 3 \times 5x \times {2}^{2} + {2}^{3} = 125 {x}^{3} + 3 \times 25 {x}^{2} \times 2 + 3 \times 5x \times 4 + 8 = 125 {x}^{3} + 150 {x}^{2} + 60x + 8$