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scrieti sub forma de putere :
[tex] x^{5} * x^{7} [/tex]
b)[tex] \frac{a ^{7} *a ^{3} }{a ^{2} } [/tex]
c)(-4y)[tex] x^{2} [/tex]*(4y[tex] x^{3} [/tex])
d)[tex]a ^{9} b ^{3}*( \frac{b ^{4} }{a {2} } ) ^{2} [/tex]


Răspuns :

a)x⁵*x₇=x⁵⁺⁷=x¹²
b)a⁷·a³ supra a²=a⁷⁺³⁻²=a⁸
d)a⁹b³ ori b⁸ supra a⁴  a⁹⁻⁴ ori b³⁺⁸=a⁵ ori b¹¹=a⁵b¹¹
c)(-4y)² ori (4y)³=4²y² ori 4³y³=4²⁺³ ori y²⁺³=4⁵ ori y⁵ =(4y)⁵