Question

Calcule

a)2x•5x b)4y•3y² c)-2x•7x

d)y•(-5y) e)-3a²•5ab

f)-x²y•y² g)4p²•(-6q³)

Answer 1

a) 10x²
b) 12y³
c) 14x²
d)-5y²
e) -15a³b
f)-x²y³
g)-24p²q³

Answer 2

a)
= 2x • 5x

= 10x²

¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
b)
= 4y • 3y²

= 4.3 . y.y²

             1 + 2
= 12 . y

= 12y³

*********************
c) 
= - 2x • 7x

= - 14x²

******************
d)
= y•(- 5y)

= - 5y²

¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
e)
= - 3 a² • 5ab

= - 3.5 .a² . a . b

= - 15 a³b

¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
f)
= - x²y • y²

= - x².y³

¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
g)

= 4p² • ( - 6q³)

= - 24p²q³

¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨