Question

Calculati :
a) [(₋3)⁷]:(-3)¹¹+(-2)x(-2)²x(-2)³:(-2)⁴
b) 100:(-10):(-5)+4x(-4)+(-5)²
x=inmultire

Answer 1

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Answer 2

$3^{7}:(-3)^{11} + (-2)*(-2)^{2}*(-2)^3:(-2)^{4} = \\ (-1)*3^{7-11}+2^{3}*(-2)^{3}:2^{4} = \\ (-1)*3^{-4} + (-1)*2^{3}*2^{3}:2^{4} = \\ \frac{-1}{81}-2^{6}:2^4= \\ \frac{-1}{81}+ (-1)* 2^{6}:2^{4}=\\ \frac{-1}{81} + (-1)* 2^{2} = \\ \frac{-1}{81} - 4 = \frac{-1-4*81}{81}=\frac{-1-324}{81}=\frac{-325}{81}\\ \\ 100:(-10):(-5)+4*(-4)+(-5)^{2} = \\ -10: (-5) -16+25 =\\ 2-16+25 =\\ 11$