if f (x) = x^2-5x+7 , Find the value of f(2) - f(-1)
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Answer:
when
f(2) = 1
f(-1) = 13
Step-by-step explanation:
when f(2)
f(x) = x² - 5x + 7
f(2) = 2²- (5×2) + 7
= 4 - 10 + 7
= 1 [ you get]
when f(-1)
f(x) = x² - 5x + 7
f(-1) = -1²- (5×-1) + 7
= 1 + 5 + 7
= 13 [ you get]
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