Question

if f(x) = x2- 4x +6 find f(1)-f(-1)

Answer 1

$<b><I>Solution:$

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f(x) = x² - 4x + 6

f(1) = 1² - 4 × 1 + 6

f(1) = 7 - 4

f(1) = 3


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f(-1) = (-1)² - 4 (-1) + 6

f(-1) = 1 + 4 + 6

f(-1) = 11

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Therefore, f(1) - f(-1)

=> 3 - 11

=> -8 [Ans]


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Thanks for the question!

Answer 2

f(x) = x^2 - 4x + 6


let first we find ,

f(1) = (1)^2 - 4(1) + 6

=1 - 4 + 6 = 3

now

f(-1 ) = (-1)^2 - 4(-1) + 6

=1 +4 + 6 = 11

f(1) - f(-1) = 3 - 11 = - 8

therefore ,f(1) - f(-1) = - 8