Question

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

Answer 1

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