Pomnóż jednomiany; a)7x3x b)4x3x^2 c)-2x6 d)2frac{1}{2}x^2(-4x) e)-2x*(-8x) f)-frac{1}{3}x^330x g)-frac{2}{5}x3frac{1}{3}x h)0,3x^21,5^2 i)-1,2(-0,3x^3) j)2x^3*(-3,8x) k)4a^2b3ab^2 l)7ab6a^2b
źródło:
a
7x*3x=21x^2
b
4x*3x^2=12x^3
c
-2x*6=-12x
d
2\frac{1}{2}x^2*(-4x)=\frac{5}{2}x^2*(-4x)=-\frac{20}{2}x^3=-10x^3
e
-2x*(-8x)=16x^2
f
-\frac{1}{3}x^3*30x=-10x^4
g
-\frac{2}{5}x*3\frac{1}{3}x=-\frac{2}{5}x*\frac{10}{3}x=-\frac{20}{15}x^2=-1\frac{5}{15}x^2=-1\frac{1}{3}x^2
h
0,3x^2*1,5^2=0675x^2
i
-1,2*(-0,3x^3)=0,36x^3
j
2x^3*(-3,8x)=-7,6x^4
k
4a^2b*3ab^2=12a^3b^3
l
7ab*6a^2b=42a^3b^2