Question

multiplica monomio por polinomio
5×(3× + 2)
3ײ(6× - 2)
-4×(7ײ - 4)
2×(ײ - 4× + 6)
-6a(3a² - 5a - 7)
7×y(4ײ - x + 5)
-×y(9ײ - 2× -6)​​

Answer 1

$1)5x(3x + 2) = \\ 15 {x}^{2} + 10x$$2)3 {x}^{2} (6x - 2) = \\ 18 {x}^{3} - 6 {x}^{2}$

$3) - 4x(7 {x}^{2} - 4) = \\ - 28 {x}^{3} + 16x$

$4)2x( {x}^{2} - 4x + 6) = \\ 2 {x}^{3} - 8 {x}^{2} + 12x$

$5) - 6a(3 {a}^{2} - 5a - 7) = \\ - 18 {a}^{3} + 30 {a}^{2} + 42a$

$6)7xy(4 {x}^{2} - x + 5) = \\ 28 {x}^{3} y - 7 {x}^{2} y + 35xy$

$7) - xy(9 {x}^{2} - 2x - 6) = \\ - 9 {x}^{3} y + 2 {x}^{2} y + 6xy$