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SEC. 4.3
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4.
Add: (2x2 -
4x + 15) + (20x2 + 14x
- 14)
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5.
Subtract: (2x2 -
4x + 15) -
(20x2 - 14x
- 14)
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SEC. 4.4. AFTER
MULTIPLYING, COLLECT LIKE TERMS AS NEEDED.
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6.
Multiply. (6a8 ·b7)·(3a4
·b3)
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7.
Multiply. 5x4·(x2 + 3x
– 4)
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8.
Multiply. (5x - 2)·(x2 + 3x + 2)
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9.
Multiply. (x -
7)·(x - 3)
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SEC. 4.5 USE FOIL
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10.
Multiply out and collect like terms . (x +
7)·(x + 7)
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11.
Multiply out and collect like terms . (x2 + 2)·(x - 7)
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12. Multiply
out and collect like terms:
(a) (x + 4)2 HINT: USE RULE THAT B2 =
B*B; THEN USE FOIL
(b) (1 + 3x)( 1 – 5x2)
(c) (x2 – 3)2
. SEE HINT TO (a) ABOVE.
(d) (n
+ 7)·(n - 7)
(e) (4n + 7)·(4n
- 7)
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Sec.
4.6 READ THE SECTION; THESE PROBLEMS ARE EASY.
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