há 5 meses - Matemática
há 5 meses
Resposta:
Explicação passo a passo:
f(-2)=-(-2)²+5-6
Y= 2²+5-6
y=4+5-6
y=3
bbbbbbbbbb-bbbbbbbbbbbbbbbbbbbbb-bbbbbbbbbbb--)-(-2/5)² +5-6
(2/5)²+5-6
2²/5⁵-1
4/25-1
(4-25)/25
-21/25
x=-0,84
c) f(x)=0
0=--x²+5-6
6-5=--x²
-x=√1
X=1