604 Вправа 604Алгебра 8 клас Бевз 2025 · § 12 · стор. 121

604. Compare the values of the function y = x², if: a) x = −3,2 і x = 0,7; b) x = −3,2 і x = 3,2; c) x = −3,2 і x = 3,5.

${\displaystyle {(-3,2)}^2=}$${\displaystyle 10,24}$;

a) ${\displaystyle 0,7^2=}$${\displaystyle 0,49}$;

${\displaystyle 10,24>0,49}$, тому ${\displaystyle y\left(-3,2\right)>y\left(0,7\right)}$;

b) ${\displaystyle 3,2^2=}$${\displaystyle 10,24}$;

${\displaystyle 10,24=}$${\displaystyle 10,24}$, тому ${\displaystyle y\left(-3,2\right)=}$${\displaystyle y\left(3,2\right)}$;

c) ${\displaystyle 3,5^2=}$${\displaystyle 12,25}$;

${\displaystyle 10,24<12,25}$, тому ${\displaystyle y\left(-3,2\right)<y\left(3,5\right)}$.