Question

SOS!!! ПОМОГИТЕ!!!
а) (2а+3b)(4a²-6ab+9b²)
б) (5-2a+a²)(4a²-3a-1)
в) (5x-2y)(25x²+10xy+4y²)
г) (m²-m+2)(3m²+m-2)

Answer 1

г)
$( {m}^{2} - m + 2)(3m ^{2} + m - 2) = 3 {m}^{4} + {m}^{3} - 2 {m}^{2} - 3 {m}^{3} - m ^{2} + 2m + 6 {m}^{2} + 2m - 4 = 3 {m}^{4} - 2 {m}^{3} + 3 {m}^{2} + 4m - 4$