Question

перетворіть вираз у многочлен (5t+2v)(2v-5t)

Answer 1

$(5t + 2v)(2v - 5t) = \\ = 10tv - 25 {t}^{2} + 4 {v}^{2} - 10vt = \\ = - 25 {t}^{2} + 4 {v}^{2} = 4 {v}^{2} - 25 {t}^{2}$

Answer 2

(a-b)(a+b)=a²-b²
(2v-5t)(2v+5t)=(2v)²-(5t)²=4v²-25t².