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3 years ago

Please help please...

Mathematics

2 answers:

Leya [2.2K]3 years ago

8 0

First one is
(2x+5)

Second one is
“All of these are correct”

Hope this helped

iogann1982 [59]3 years ago

7 0

Answer:

(2x + 5)

Step-by-step explanation:

2(x + 1) + 6x = 4(2x + 5) + 2

2x + 2 + 6x = 8x + 20 + 2

8x + 2 = 8x + 22

Because both sides are 8x it will have no solution

Second one is "all of these are correct"

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3 years ago

If you are reading this please help!!!!

Soloha48 [4]

Given:

$1. -3 x^{2}\left(4 x^{3}-7\right)\\$2. $(6 x-5)(2 x+3)$\\3. $(3 x-1)\left(x^{2}+5 x-2\right)$$

To find:

The product of the polynomials.

Solution:

1. $-3 x^{2}\left(4 x^{3}-7\right)$ $=-3 x^{2}(4 x^{3}) -3 x^{2}(-7)$

Multiply the numerical coefficient and add the powers of x.

$=-12 x^{5}+21 x^{2}$

2. $(6 x-5)(2 x+3)=6 x(2 x+3)-5(2x+3)$

Multiply each term of first polynomial with each term of 2nd polynomial.

Multiply the numerical coefficient and add the powers of x.

$=12 x^2+18x-10 x-15$

$=12 x^2+8x-15$

3. $(3 x-1)\left(x^{2}+5 x-2\right)=3 x(x^{2}+5 x-2)-1(x^{2}+5 x-2)$

Multiply each term of first polynomial with each term of 2nd polynomial.

Multiply the numerical coefficient and add the powers of x.

$=3x^{3}+15 x^2-6x-x^{2}-5 x+2$

Add or subtract like terms together.

$=3x^{3}+14 x^2-11x+2$

The answer for multiplying polynomials:

$1. -12 x^{5}+21 x^{2}$

$2. \ 12 x^2+8x-15$

$3. \ 3x^{3}+14 x^2-11x+2$

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3 years ago

Which of the following algebraic expressions represents the sum of 7 and one-fifth of x?

Simora [160]

Answer:

Step-by-step explanation:

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2 years ago

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Answer:

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3 years ago