Question

(iii) (m-2n-1) x (2m + n-4)
find the product​

Answer 1

Step-by-step explanation:

(3m−2n)(2m−3n)

at [m=1] & [n=−1]

now

=[3×1−2(−1)][2×−3(−1)]

[3+2][2+3]

5×5

=25

Answer 2

Answer:

2m² - 2n² - 3mn - 6m +7n + 4 is the answer

Step-by-step explanation:

(m- 2n -1) x (2m + n-4)

2m² + mn - 4m -4mn -2n² + 8n - 2m - n + 4

2m² - 2n² - 3mn - 6m +7n + 4