q2 find f(-4) if f(x)=x^2 - x\n-20\n-12\n12\n20
q2 find f(-4) if f(x)=x^2 - x\n-20\n-12\n12\n20
Answer
Explanation:
Step1: Substitute x = -4
Substitute x=-4 into f(x)=x² - x. So we get f(-4)=(-4)²-(-4).
Step2: Calculate (-4)²
(-4)² = 16. So f(-4)=16 - (-4).
Step3: Calculate 16 - (-4)
16-(-4)=16 + 4 = 20.
Answer:
D. 20