How do you find the value of f(-5) for the function f(x)=3x^2-2x+5

Question

asked Mar 28, 2024 150k views

2 Answers

AntonNiklasson · Answer 1 · 2024-03-28T22:10:55+0000

To find the value of f(-5) for the given function , we just need to put the value of x ( which is -5) in the given function. Let's do it!

$\purple{\frak{\implies f(x) = 3x^2-2x+5}} \\$

$\sf \implies f(-5) = 3 * (-5)^2 - 2(-5) + 5 \\$

$\sf \implies f(-5) = (3* 25) +10 + 5 \\$

$\sf \implies f(-5) = 75 + 10+5\\$

$\purple{\frak{ \implies f(-5) = 90} }\\$

Darmis · Answer 2 · 2024-03-31T17:08:39+0000

Answer: 90

Explanation:

f(x) = 3x^2-2x+5

f(-5) = 3 x (-5)^2 - 2(-5) + 5

f(-5) = (3x25) +10 + 5

f(-5) = 75 + 15

f(-5) = 90