CPM Homework Help : PC Problem 1-24

CPM Homework Banner

Home > PC > Chapter 1 > Lesson 1.1.2 > Problem 1-24

1-24.

Suppose $f\left(x\right) = 2x^{2} − 3$ , find:

$f\left(4\right)$
Hint (a):
Substitute $4$ for every $x$ in the function.
Step (a):
$f\left(4\right) = 2\left(4\right)^{2} − 3$

$f\left(−5\right)$
Hint (b):
Use ( ) when substituting to avoid errors.
Step 1(b):
$f\left(−5\right) = 2\left(−5\right)^{2} − 3$

$f\left(3b\right)$
Hint (c):
Follow the same steps for (b).

$f\left(a + 1\right)$
Hint (d):
Do not forget the middle term when expanding $\left(a + 1\right)^{2}$ .
Answer (d):
$2a^{2} + 4a − 1$

© 2022 CPM Educational Program. All rights reserved.