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Wittaler [7]
3 years ago
15

Simplify. (3x^2-2x+2)-(x^2+5x-5)

Mathematics
2 answers:
Montano1993 [528]3 years ago
5 0

Answer:

2 x^2 - 7 x + 7

Step-by-step explanation:

(3x^2-2x+2)-(x^2+5x-5)

Distribute the minus sign to all terms in the  second parenthesis.

Plus signs become minus and minus signs become plus signs

(3x^2-2x+2)-x^2-5x+5

Combine like terms

3x^2 -x^2 -2x -5x +2 +5

2 x^2 - 7 x + 7

kap26 [50]3 years ago
4 0

I think this would be the answer: 2x^2  - 7x  + 7

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Part (a)

Replace every 'a' with 5.2 and replace every 'b' with 4.7

Then use your calculator to evaluate.

3a + b^3 = 3*5.2 + (4.7)^3 = 119.423

<h3>Answer: 119.423</h3>

===============================================

Part (b)

The true value is 119.423 which is the result of part (a)

The estimated value is 140

Subtract the two values

140-119.423 = 20.577

and divide that over the true value

20.577/140 = 0.14697857142858

Which, when rounded to 4 decimal places, we get 0.1470

Move the decimal place over to the right 2 spots to get 14.70%

<h3>Answer: 14.70% error (approximate)</h3>
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3 years ago
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