Foe Exercises 115–116, use the formula x = ( n 2 ) 2 + ( m 3 ) 3 + n 2 3 − ( n 2 ) 2 + ( m 3 ) 3 − n 2 3 to find a solution to the equation x 3 + m x = n x 3 + 9 x = 26
Foe Exercises 115–116, use the formula x = ( n 2 ) 2 + ( m 3 ) 3 + n 2 3 − ( n 2 ) 2 + ( m 3 ) 3 − n 2 3 to find a solution to the equation x 3 + m x = n x 3 + 9 x = 26
Solution Summary: The author explains how to calculate the solution to the equation x3+9x=26.
Exercises 38–40 will help you prepare for the material covered in
the first section of the next chapter.
In Exercises 38-39, simplify each algebraic expression.
38. (-9x³ + 7x? - 5x + 3) + (13x + 2r? – &x – 6)
39. (7x3 – 8x? + 9x – 6) – (2x – 6x? – 3x + 9)
40. The figures show the graphs of two functions.
y
y
201
10-
....
-20-
flx) = x³
glx) = -0.3x + 4x + 2
In Exercises 101–103, perform the indicated operations.
1
1
1
101.
x" – 1 x" + 1 x2" – 1
(1-X- -X )
(1 –
(1 –
102. (1 -
x + 1)
x + 2
x + 3
103. (x – y)-1 + (x – y)-2
In Exercises 102–103, perform the indicated operations. Assume
that exponents represent whole numbers.
102. (x2n – 3x" + 5) + (4x2" – 3x" – 4) – (2x2 – 5x" – 3)
103. (y3n – 7y2n + 3) – (-3y3n – 2y2" – 1) + (6y3n – yn + 1)
104. From what polynomial must 4x? + 2x – 3 be subtracted to
obtain 5x? – 5x + 8?
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