aide moi svp a)15ac+14ac b)23xy-35xy c)2a2+8a2 d)7x2-12x2 e)7ab+5ba f)9.8yz-15zy g)11y2-8b-9b2+6b h)

bonsoir

)15ac+14ac = 29ac

b)23xy-35xy = -12xy

c)2a2+8a2 =10a²

d)7x2-12x2 = -5x²

e)7ab+5ba = 12ab

f)9.8yz-15zy = -5.2yz

g)11y2-8b-9b2+6b =11y²-9b²-2b

a/  ac(15+14)
b/ xy ( 23 - 35)
c/ a2 ( 2 + 8)
d/ 2( 7 - 12 )
e/ ab ( 7 + 5)
f/ yz ( 9.8 - 15 )
g/ b ( 11y 2 - 17 +8 )