13.8. 1) (x - 4a)(5a + 8x) – (6a – 7x)(3x – 2a); 2) (6c + d)(80 – 9d) + (-10d + 2c)(11c - 4d);
3) ( b- 5k)(6k – 0,3b) – (3k + b)(66 - 1,8k);
4)CEx - y)(7y - 8x)+(y
y)(7y - 8x) +(y - 3*)(7x – 8y).
1

Question

Математика: 13.8. 1) (x - 4a)(5a + 8x) – (6a – 7x)(3x – 2a); 2) (6c + d)(80 – 9d) + (-10d + 2c)(11c - 4d);3) ( b- 5k)(6k – 0,3b) – (3k + b)(66 - 1,8k);4)CEx - y)(7y - 8x)+(yy)(7y - 8x) +(y - 3*)(7x – 8y).1​

ShvarykValerua · Answer

1) (x - 4a)(5a + 8x) – (6a – 7x)(3x – 2a);

2 2

-59ax- 29x - 8a

2) (6c + d)(80 – 9d) + (-10d + 2c)(11c - 4d);

2 2

480c-172cd+80d+31d +22c

3) ( b- 5k)(6k – 0,3b) – (3k + b)(66 - 1,8k);

2

36x- 9.8b-30kx+3.3dk-24k+5.4k

13.8. 1) (x - 4a)(5a + 8x) – (6a – 7x)(3x – 2a); 2) (6c + d)(80 – 9d) + (-10d + 2c)(11c - 4d);3) ( b

13.8. 1) (x - 4a)(5a + 8x) – (6a – 7x)(3x – 2a); 2) (6c + d)(80 – 9d) + (-10d + 2c)(11c - 4d);3) ( b- 5k)(6k – 0,3b) – (3k + b)(66 - 1,8k);4)CEx - y)(7y - 8x)+(yy)(7y - 8x) +(y - 3*)(7x – 8y).1​

13.8. 1) (x - 4a)(5a + 8x) – (6a – 7x)(3x – 2a); 2) (6c + d)(80 – 9d) + (-10d + 2c)(11c - 4d);
3) ( b- 5k)(6k – 0,3b) – (3k + b)(66 - 1,8k);
4)CEx - y)(7y - 8x)+(y
y)(7y - 8x) +(y - 3*)(7x – 8y).
1