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2 years ago

Which expression is equivalent to 2x2 + (4x - 6x2) + 9 - (6x + 3)?

Mathematics

2 answers:

Dmitrij [34]2 years ago

6 0

Answer:

-4x^2-10x+6

Step-by-step explanation:

Troyanec [42]2 years ago

4 0

Answer:

-4 $x^2$ -10x+6

Step-by-step explanation:

I am going to assume the (Something)x2 means (Something) $x^2$ . Then, the expression is 2 $x^2$ -6 $x^2\\$ +4x-6x+9-3=-4 $x^2$ -10x+6

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Select the correct answer

Paladinen [302]

Answer:

a) We get $\mathbf{A+B=x^2-2x+1}$

So, Is the result of A+B is a polynomial:Yes

b) We get $\mathbf{A-B=6x^3-7x^2+2x-1}$

So, Is the result of A-B is a polynomial:Yes

c) We get $\mathbf{A.B=9x^6+21x^5-18x^4+9x^3-3x^2}$

So, Is the result of A.B is a polynomial:Yes

Step-by-step explanation:

We are giving the polynomial equations:

$A= 3x^2(x-1)\\B=-3x^3+4x^2-2x+1$

We need to find

a) A+B

$A+B=3x^2(x-1)+(-3x^3+4x^2-2x+1)\\A+B=3x^3-3x^2-3x^3+4x^2-2x+1\\A+B=3x^3-3x^3-3x^2+4x^2-2x+1\\A+B=x^2-2x+1\\$

So, we get $\mathbf{A+B=x^2-2x+1}$

So, Is the result of A+B is a polynomial:Yes

b) A-B

$A-B=3x^2(x-1)-(-3x^3+4x^2-2x+1)\\A-B=3x^3-3x^2+3x^3-4x^2+2x-1\\A-B=3x^3+3x^3-3x^2-4x^2+2x-1\\A-B=6x^3-7x^2+2x-1\\$

So, we get $\mathbf{A-B=6x^3-7x^2+2x-1}$

So, Is the result of A-B is a polynomial:Yes

c) A . B

$A.B=3x^3(-3x^3+4x^2-2x+1)-3x^2(-3x^3+4x^2-2x+1)\\A.B=9x^6+12x^5-6x^4+3x^3+9x^5-12x^4+6x^3-3x^2\\A.B=9x^6+12x^5+9x^5-6x^4-12x^4+3x^3+6x^3-3x^2\\A.B=9x^6+21x^5-18x^4+9x^3-3x^2$

So, we get $\mathbf{A.B=9x^6+21x^5-18x^4+9x^3-3x^2}$

So, Is the result of A.B is a polynomial:Yes

7 0

2 years ago

Write down the size of angle ABC give a reason for your answer

solong [7]

Answer:

∠ ABC = 90°

Step-by-step explanation:

∠ ABC is the angle in a semi circle and is right, that is

∠ ABC = 90°

6 0

3 years ago

Helppppp thanksssssssss

klemol [59]

The 3rd or 1st one I'm not sure which one but u have an idea of what it might be

4 0

3 years ago

Simplify the following expression: -k - 11 - 2 + 2k

gulaghasi [49]

Answer:

k-13

Step-by-step explanation:

brainliest?

5 0

3 years ago

Read 2 more answers

What Does x AND y equal

Tema [17]

90-62=28
x=28
90-62=28
y=28
*right angle triangle is 90 degrees

4 0

2 years ago

Which expression is equivalent to 2x2 + (4x - 6x2) + 9 - (6x + 3)?​

Which expression is equivalent to 2x2 + (4x - 6x2) + 9 - (6x + 3)?