Question

15.7. 1) 4b(7-8a) + a(8a-7)-(14-16a) + (7-8a)ab; 2) 3x(5y-4)-y(4-5y) + (15y-12)-3xy(4-5y); 3) mn(m-3n) - m(m-3n) - n(m-3n) + 8(6n-2m); 4) (- 2 t + k)x-(k-t)y+ (3k-21)xy - (-2t + 3k). Срочно пж​

Answer 1

Ответ:

4b(7-8a)+a(8a-7)-(14-16a)+(7-8a)ab= 28b-32ab+8a^2-7a-14+16a+7ab-8a^2b=28b-25ab+8a^2+9a-14-8a^2b