In Exercises 3–30, use the formula to determine the value of the indicated variable for the values given. Use a calculator when one is needed. When necessary, use the Π key on your calculator and round answers 24. x = − b + b 2 − 4 a c 2 a ; determine x when a = 2, b = −5, and c = −12 (mathematics).
In Exercises 3–30, use the formula to determine the value of the indicated variable for the values given. Use a calculator when one is needed. When necessary, use the Π key on your calculator and round answers 24. x = − b + b 2 − 4 a c 2 a ; determine x when a = 2, b = −5, and c = −12 (mathematics).
Solution Summary: The author explains the formula for determining the value of indicated variable x.
In Exercises 3–30, use the formula to determine the value of the indicated variable for the values given. Use a calculator when one is needed. When necessary, use the Π key on your calculator and round answers
24.
x
=
−
b
+
b
2
−
4
a
c
2
a
; determine x when a = 2, b = −5, and c = −12 (mathematics).
In Exercises 3–4, use the order of operations to simplify each
expression.
8 - 3? ÷ 9
|-5| - [5 - (18 - 6)]?
3.
4. 4
(2 – 9)° + 32 ÷ 1 + 3
5. Simplify: 3 - [2(x – 2) – 5x].
Please simplify completely. In #1–4, list the necessary restrictions on the variable; if none, write “none”.
For Exercises 8–10,
a. Simplify the expression. Do not rationalize the denominator.
b. Find the values of x for which the expression equals zero.
c. Find the values of x for which the denominator is zero.
4x(4x – 5) – 2x² (4)
8.
-6x(6x + 1) – (–3x²)(6)
(6x + 1)2
9.
(4x – 5)?
-
10. V4 – x² - -() 2)
Chapter 6 Solutions
Survey of Mathematics with Applications, A, a la Carte edition plus NEW MyLab Math with Pearson eText (10th Edition)
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