Question

calculati dand factor comun:

a) 103*45+81*45-22*45 b) a*x+a
c) 42a-7b d) 16*25+16*15-40*3

Answer 1

a)45(103+81-22)
=45*162
=7290

b)a(x+1)

c)7(6a-b)

d)16(25+15)-40*3
=16*40-40*3
=40(16-3)
=40*13
=520