Question

5.36. Выполните умножение двучленов:
4) (7x-2)(7x+2);
5)
(8b+5a)(5a-8b);
6) (10p-6q)(10p+6q).
1) (m-3)(m+3);
2) (c-7)(c+7);
3) (4+5a)(5a-4);

Answer 1

Ответ:

$(7x - 2)(7x + 2) = 49 {x}^{2} - 4$

$(8b + 5a)(5a - 8b) = 25 {a}^{2} - 64 {b}^{2}$

$(10p - 6q)(10p + 6q) = 100 {p}^{2} - 36 {q}^{2}$

$(m - 3)(m + 3) = {m}^{2} - 9$

$(c - 7)(c + 7) = {c}^{2} - 49$

$(4 + 5a)(5a - 4) = 25 {a}^{2} - 16$

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