Question

Dada a função
f(x) = - x ² + x - 8, calcule
f(-1) ,f(√2) e f(½)

Answer 1

f(-1)= -(-1)²-1-8= -1-1-8= -10
f()= - (√2)² +√2- 8= - 2 +√2-8= √2-10
f(1/2)= - (1/2)² + 1/2 -8= - 1/4 + 1/2- 8=( -1+ 2 - 32)/4= -31/4