Question

Решите пожалуйста с объяснением, очень нужно ​

Answer 1

Ответ:

Объяснение:

A4.

(4p-q)(5p-2q)=20p²-8pq-5pq+2q²=20p²-13pq+2q²

1) (2q-5p)(q-4p)=20p²-13pq+2q²

2q²-8pg-5pq+20p²=20p²-13pq+2q²

20p²-13pq+2q²=20p²-13pq+2q²

20p²-13pq+2q²-20p²+13pq-2q²=0

0=0

2) -(q--4p)(2q-5p)=20p²-13pq+2q²

-(2q²-5pq-8pq+20p²)=20p²-13pq+2q²

-20p²+13pq+2q²=20p²-13pq+2q²

-20p²+13pq+2q²-20p²+13pq-2q²=0

-40p²+26pq≠0

3) (4p-q)(2q-5p)=20p²-13pq+2q²

8pq-20p²-2q²+5pq=20p²-13pq+2q²

-20p²+13pq-2q²=20p²-13pq+2q²

-20p²+13pq-2q²-20p²+13pq-2q²=0

-40p²+26pq-4q²≠0

4) (5p-2q)(q-4p)=20p²-13pq+2q²

5pq-20p²-2q²+8pq=20p²-13pq+2q²

-20p²+13pq-2q²-20p²+13pq-2q²=0

-40p²+26pq-4q²≠0

Ответ: вариант 1.

B1.

16x²-(4x-1)(4x-3)=13

16x²-16x²+12x+4x-3=13

16x=13+3

x=16/16=1

Ответ: 1.