Question

Efectuati utilizand factorul comun 14x12-14x7-5x13= 7x49+7x31-7x50= 32x25+32x11-36x30= 99x11+13x11-112= 177x36-177x31-77x5= 32+32x15+32x84=

Answer 1

a)14x12-14x7-5x13=14x(12-7)-5x13=14x5-5x13=5x(14-13)=5x1=5
b) 7x49+7x31-7x50=7x(49+31-50)=7x30=210
c) 32x25+32x11-36x30=32x(25+11)-36x30=32x36-36x30=36x(32-30)=36x2=72
d) 99x11+13x11-112=11x(99+13)-112=11x112-112=112x(11-1)=112x10=1120
e) 177x36-177x31-77x5=177x(36-31)-77x5=177x5-77x5=5x(177-77)=5x100=500
f) 32+32x15+32x84=32x(1+15+84)=32x100=3200