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1. In the expression (-3xy)², what is the base? *


Sagot :

Answer:

[tex]=9x^2y^2[/tex]

Solutions:

[tex]\left(-3xy\right)^2[/tex]

[tex]\mathrm{Apply\:exponent\:rule}:\quad \left(-a\right)^n=a^n,\:\quad \mathrm{if\:}n\mathrm{\:is\:even}[/tex]

[tex]\left(-3xy\right)^2=\left(3xy\right)^2[/tex]

[tex]\mathrm{Apply\:exponent\:rule}:\quad \left(a\cdot \:b\right)^n=a^nb^n[/tex]

[tex]\left(3xy\right)^2=3^2x^2y^2[/tex]

[tex]=3^2x^2y^2[/tex]

[tex]3^2=9[/tex]

[tex]=9x^2y^2[/tex]