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devlian [24]
3 years ago
10

Shota tried to subtract two polynomials. His work is shown below: \begin{aligned} &\phantom{=}(12a^2+3ab+4b^2)-(7a^2-5ab+b^2

) \\\\ &=12a^2+3ab+4b^2-7a^2+5ab-b^2&\text{Step }1 \\\\ &=(12+3)a^3+(3+4)b^3+(-7+5)a^3+(5-1)b^3&\text{Step }2 \\\\ &=15a^3+7b^3-2a^3+4b^3&\text{Step }3 \end{aligned} ​ =(12a 2 +3ab+4b 2 )−(7a 2 −5ab+b 2 ) =12a 2 +3ab+4b 2 −7a 2 +5ab−b 2 =(12+3)a 3 +(3+4)b 3 +(−7+5)a 3 +(5−1)b 3 =15a 3 +7b 3 −2a 3 +4b 3 ​ Step 1 Step 2 Step 3 ​
Mathematics
1 answer:
Soloha48 [4]3 years ago
4 0

Answer:

what-

in the world

Step-by-step explanation:

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Three students were given the expression shown and were asked to take a common factor out of two of the terms.
vagabundo [1.1K]

Answer:

Step-by-step explanation:

Expression given → 4 - 9x + 21

Chang's expression → 4 - 3(3x + 7)

Chang's expression is incorrect because the correct expression is [4 - 3(3x - 7)]

Benjamin's expression → 4 + 3(3x + 7)

Benjamin's expression is incorrect because the correct expression is [4 - 3(3x - 7)]

Habib's expression → 4 + 12x

Habib's expression is incorrect because the correct expression is [4 - 3(3x - 7)]

Correct expression → [4 - 3(3x - 7)]

4 0
3 years ago
In parallelogram ABCD, AC=87.5 and BC=52.5. If ABCD is a rectangle, find AB.
igor_vitrenko [27]
We can do this using Pythagorus,,,
87.5*2 - 52.5*2 = AB*2
4900 = AB*2
70 = AB
3 0
3 years ago
PLEASSEEE I NEED HELPP
Alex777 [14]

Answer:

b=5V2

Step-by-step explanation:

Area =31 1/4 = b*12.5 sin45/2=b*12.5*V2/2* 1/2=12.5V2/4 *b

(31*4+1)/4=125/4

so 125/4= 12.5V2*b/4

12.5V2*b=125

b=125/12.5V2=10/V2=10V2/2=5V2

3 0
3 years ago
Is a quadratic sequence (2,3,6,11) arithmetic, geometric, or neither?
Karolina [17]

Answer:

Neither

Step-by-step explanation:

It's neither. The terms do not differ (which means you add the same number to each term) by any constant amount.  (Arithmetic)

The terms do not have a common number that you multiply the present term to get the next term. (Geometric)

So this one is neither.

3 0
4 years ago
1. What is the slope of a line that is parallel to the line represented by the equation 3x + 4y = 12?
inn [45]

Answer:

Explained Below

Step-by-step explanation:

first we need to turn the equation into point slope form.

3x + 4y = 12

4y = -3x + 12

y = -0.75 + 3

Parallel lines don't have a change in slope because they run parallel. Your answer would be -0.75 or -3/4.

4 0
3 years ago
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