By calculating the following polynomials f(x) let us write the values of f(1) and f(–1):
f(x) = 6 + 10x – 7x2
Formula used/Theory.
Putting the value of ‘x’ in f(x) gives out the value of f(x) on ‘x’
We have,
f(x) = 6 + 10x – 7x2
when we put x = 1
then,
f(1) = 6 + 10 × (1) – 7(1)2
f(1) = 6 + 10 × 1 – 7 × 1
f(1) = 6 + 10 – 7
f(1) = 9
when we put x = -1
then,
f(-1) = 6 + 10 × (-1) – 7(-1)2
f(-1) = 6 + 10 × (-1) – 7 × 1
f(-1) = 6 – 10 – 7
f(-1) = -11
Conclusion.
The value of f(1), f(-1) are 9, -11 respectively.