744 Вправа 744Алгебра 8 клас Бевз 2025 · § 15 · стор. 144

744. Calculate the value of the expression.

a) ${\displaystyle 3\sqrt{5^2}=}$${\displaystyle 3\cdot 5=}$${\displaystyle 15}$;

b) ${\displaystyle -\sqrt{4^4}=}$${\displaystyle -4^2=}$${\displaystyle -16}$;

c) ${\displaystyle 4\sqrt{0,1^4}=}$${\displaystyle 4\cdot 0,1^2=}$${\displaystyle 4\cdot 0,01=}$${\displaystyle 0,04}$;

d) ${\displaystyle -8\sqrt{0,2^4}=}$${\displaystyle -8\cdot 0,2^2=}$${\displaystyle -8\cdot 0,04=}$${\displaystyle -0,32}$;

e) ${\displaystyle \sqrt{{(-5)}^2}=}$${\displaystyle |-5|=}$${\displaystyle 5}$;

f) ${\displaystyle \sqrt{{(-3)}^6}=}$${\displaystyle \left|{(-3)}^3\right|=}$${\displaystyle |-27|=}$${\displaystyle 27}$;

g) ${\displaystyle -\sqrt{{(-7)}^8}=}$${\displaystyle -{(-7)}^4=}$${\displaystyle -2401}$;

h) ${\displaystyle -2\sqrt{{(-4)}^2}=}$${\displaystyle -2\cdot |-4|=}$${\displaystyle -2\cdot 4=}$${\displaystyle -8}$.