Question

2) Dada f: R → R definida por f(x) = x² − 2x,
determine o valor de A = f(−3) + 3. f(1) − 2. f(−5)

AJUDEMMMM PFFF!

Answer 1

f(x) = x² − 2x

A = f(−3) + 3. f(1) − 2. f(−5)

f(−3) = (−3)² − 2(−3)

f(−3) = 9 + 6

f(−3) = 15

f(1) = 1² − 2

f(1) = 1 − 2

f(1) = −1

f(−5) = (−5)² − 2(−5)

f(−5) = 25 + 10

f(−5) = 35

A = f(−3) + 3. f(1) − 2. f(−5)

A = 15 + 3(−1) − 2(35)

A = 15 − 3 − 70

A = −58

Espero ter ajudado :)