Question

PLEASE HELP

If f(x) = 3x² - 5√2x - 1, find the value of f(√2).
a.-5
b.-2
d. -8
c. 0

Answer 1

A

Explanation:

Let's find the value of the function f(x) for x = √2. We'll substitute x by √2 in the equation:

f(√2) = 3(√2)² - 5√2√2 - 1

First, let's simplify the terms:

(√2)² = 2 ⇒ 3(2) = 6

5√2√2 = 5*2 = 10

Now, substitute these in the equation:

f(√2) = 6 - 10 - 1

f(√2) = -4 - 1

f(√2) = -5

Thus, the value of f(√2) is -5. The correct answer is (a).