Question

Multiplicación de un número y un polimonio b -5(×+6y). c 6(4×-y). d -8(-5a-36) e 10(-9a+2b). f -3(8a+7b g 7(10×-5y). h -2(7×-20y). i 9(2×+5y)​

Answer 1

a) 4(2x+7y) = 4*2x + 4*7y = 8x + 28y

b) -5(x+6y) = -5*x + (-5)*6y = -5x -30y

c) 6(4x-y) = 6*4x - 6*y = 24x -6y

d) -8(-5a-3b) = (-8)*(-5a) + (-8)*(-3b) = 40a + 24b

e) 10(-9a+2b) = 10*(-9a) + 10*2b = -90a + 20b

f) -3(8a+7b) = (-3)*8a + (-3)*7b = -24a -21b

g) 7(10x-5y) = 7*10x - 7*5y = 70x -35y

h) -2(7x-20y) = (-2)*7x + (-2)*(-20y) = -14x +40y

i) 9(2x+5y) = 9*2x + 9*5y = 18x + 45y