Q. 2 D4.0( 5 Votes )

# 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.

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