Question

Multiplying polynomials (3m-1)(8m+7)

Answer 1

(3m -1)(8m + 7)

= {3m(8m + 7)} - {1(8m+7)}

= 24m² + 21m - 8m+ 7

= 24m² + 13m - 7

Answer 2

$(3m-1)(8m+7)=3m\cdot 8m+3m\cdot 7-1\cdot 8m-1\cdot 7=\\ \\=24m^2+21m-8m-7=24m^2+13m-7$