question given $f(x)=-x^{2}+2x + 9$, find $f(3)$
question given $f(x)=-x^{2}+2x + 9$, find $f(3)$
Answer
Explanation:
Step1: Substitute x = 3
Substitute (x = 3) into (f(x)=-x^{2}+2x + 9). [f(3)=-(3)^{2}+2\times3 + 9]
Step2: Calculate powers
Calculate ((3)^{2}=9). [f(3)=-9 + 2\times3+9]
Step3: Calculate multiplication
Calculate (2\times3 = 6). [f(3)=-9+6 + 9]
Step4: Calculate addition - subtraction
(-9+6+9=6). [f(3)=6]
Answer:
6