# Given the piecewise function below, select all of the statements that are true. f(x)= left{-x + 1, x < 0right} left{-2, x = 0right} left{x^{2} -1, x > 0right} A. f(4)=7 B. f(-1)=2 C. f(1)=0 D. f(-2)=0

Given the piecewise function below, select all of the statements that are true.
$f\left(x\right)=\left\{-x+1,x<0\right\}\left\{-2,x=0\right\}\left\{{x}^{2}-1,x>0\right\}$
A. $f\left(4\right)=7$
B. $f\left(-1\right)=2$
C. $f\left(1\right)=0$
D. $f\left(-2\right)=0$
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Result:
B, $-\left(-1\right)+1=2$
C, ${1}^{2}-1=0$
f(4) is ${4}^{2}-1=15$
f(-2) is $-\left(-2\right)+1=3$