In Exercises 24–29 , solve by Cramer’s rule, where it applies − x 1 − 4 x 2 + 2 x 3 + x 4 = − 32 2 x 1 − x 2 + 7 x 3 + 9 x 4 = 14 - x 1 + x 2 + 3 x 3 + x 4 = 11 x 1 − 2 x 2 + x 3 − 4 x 4 = − 4
In Exercises 24–29 , solve by Cramer’s rule, where it applies − x 1 − 4 x 2 + 2 x 3 + x 4 = − 32 2 x 1 − x 2 + 7 x 3 + 9 x 4 = 14 - x 1 + x 2 + 3 x 3 + x 4 = 11 x 1 − 2 x 2 + x 3 − 4 x 4 = − 4
In Exercises 20–21, solve each rational equation.
11
20.
x + 4
+ 2
x2 – 16
-
x + 1
21.
x? + 2x – 3
1
1
x + 3
x - 1
||
For Exercises 5–10,
a. Simplify the expression.
b. Substitute 0 for h in the simplified expression.
2(x + h)? + 3(x + h) ·
5.
(2x + 3x)
3(x + h - 4(x + h) – (3x - 4x)
6.
h
1
1
1
1
(x + h) – 2
7.
x - 2
2(x + h) + 5
8.
2x + 5
h
(x + h) – x
9.
(x + h)
10.
- X
h
h
For Exercises 23–24, use the remainder theorem to determine
if the given number c is a zero of the polynomial.
23. f(x) = 3x + 13x + 2x + 52x – 40
a. c = 2
b. c =
24. f(x) = x* + 6x + 9x? + 24x + 20
а. с 3D —5
b. c = 2i
Using and Understanding Mathematics: A Quantitative Reasoning Approach (6th Edition)
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HOW TO FIND DETERMINANT OF 2X2 & 3X3 MATRICES?/MATRICES AND DETERMINANTS CLASS XII 12 CBSE; Author: Neha Agrawal Mathematically Inclined;https://www.youtube.com/watch?v=bnaKGsLYJvQ;License: Standard YouTube License, CC-BY