Question

find the value of f of x is equal to 2 X square + 7 x + 3 at x is equal to minus 2​

Answer 1

If f(x) = 2x2 + 7x + 3

X=-2

=2 (-2)2 + 7(-2) +3

=2(4) - 14 + 3

=8 -14 + 3

F(x)=-3

Answer 2

The value of given expression is -3

Solution:

Given that,

$f(x) = 2x^2 + 7x + 3$

We have to find the value of above expression at x = -2

Substitute x = -2 in f(x) and find the value

From given,

$f(x) = 2x^2 + 7x + 3\\\\f(-2) = 2(-2)^2 + 7(-2) + 3\\\\f(-2) = 2 \times 4 - 14 + 3 \\\\f(-2) = 8 - 11\\\\f(-2) = -3$

Thus the value of given expression is -3

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