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Help please I don't know

Help please I don't know-example-1
User Telemaco
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The first row multiplication of
(4x^3 + 0x^2 - 3x + 4) and
(2x - 5) results in
-20x^3 + 0x^2 + 15x - 20.

To multiply the two polynomials
(4x^3 + 0x^2 - 3x + 4) and (2x - 5), we can use the distributive property. This property states that for any numbers a, b, and c:

(a + b) * c = a * c + b * c.

In this case, the first polynomial
(4x^3 + 0x^2 - 3x + 4) will be multiplied by each term of the second polynomial
(2x - 5).

First, we multiply each term of the first polynomial by the first term of the second polynomial, which is 2x:


(4x^3 + 0x^2 - 3x + 4) *
2x =
(4x^3 * 2x) +
(0x^2 * 2x) +
(-3x * 2x) +
(4 * 2x).

This simplifies to:


8x^4 + 0x^3 - 6x^2 + 8x.

Next, we multiply each term of the first polynomial by the second term of the second polynomial, which is -5:


(4x^3 + 0x^2 - 3x + 4) * -5 =
(4x^3 * -5) +
(0x^2 * -5) +
(-3x * -5) +
(4 * -5).

This simplifies to:


-20x^3 + 0x^2 + 15x - 20.

Finally, we add the results of these two multiplications together:


(8x^4 + 0x^3 - 6x^2 + 8x) + (-20x^3 + 0x^2 + 15x - 20).

Combining like terms gives us the final result:


-20x^3 + 0x^2 + 15x - 20.

So the multiplication of
(4x^3 + 0x^2 - 3x + 4) and
(2x - 5)results in
-20x^3 + 0x^2 + 15x - 20.

User ViduraPrasangana
by
8.0k points

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