If F (x)= 2x^2-5x-3
Determine f (-4)
F (-4)=2 (-4)^2-5 (-4)-3
(I'm confused like do I use bedmas to solve this? )
F (-4)= 16-(-20)-3
F (-4)=36-3
F (-4)=33
Is that right?
almost. You forgot the 2x^2
f(-4) = 2*16+20-3
Ohh. So the answer is f (-4)=49
that's better.
Thank you
Yes, that is correct! To solve for F(-4), you need to substitute -4 into the equation F(x) = 2x^2 - 5x - 3.
Let's simplify the equation step by step:
1. Start by substituting -4 for x:
F(-4) = 2(-4)^2 - 5(-4) - 3
2. Next, calculate the exponents:
F(-4) = 2(16) - 5(-4) - 3
3. Multiply the numbers:
F(-4) = 32 + 20 - 3
4. Finally, add or subtract to get the final answer:
F(-4) = 52 - 3 = 49
So, F(-4) equals 49. Well done!