Question

please answer me fast​

Answer 1

$(n - 3)(2n + 1) \\ n(2n + 1) - 3(2n + 1) \\ 2n^{2} + n - 6n - 3 \\ 2n^{2} - 5n - 3$

for 1st one

=)(4n-5)(5n+1)

=)4n(5n+1)-5(5n+1)

=)20n²+4n-25n-5

=) 20n²-21n-5