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3 years ago

If x=3 what is the value of the expression -2x(2 x^3+3x^2-5x)

Mathematics

1 answer:

aalyn [17]3 years ago

7 0

Answer:

The value would be -396

Step-by-step explanation:

In order to find this, put in 3 for every value of x and then simplify.

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

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

-6(2(27) + 3(9) - 15)

-6(54 + 27 - 15)

-6(66)

-396

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3 years ago

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3 years ago

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3 years ago

If the perimeter of this triangle is to be no more than 77 feet, write an inequality and

Sergio039 [100]

Given:

Consider the sides of the triangle are 4x+10, 2x-5 and 18 (in feet).

Perimeter of this triangle is to be no more than 77 feet.

To find:

The inequality and solution of the inequality.

Solution:

Perimeter of a triangle is the sum of all side.

Perimeter of given triangle $=(4x+10)+(2x-5)+18$

Perimeter of this triangle is to be no more than 77 feet. It means perimeter must be less than or equal to 77.

$(4x+10)+(2x-5)+18\leq 77$

$(4x+2x)+(10-5+18)\leq 77$

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$6x\leq 77-23$

$6x\leq 54$

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$x\leq \dfrac{54}{6}$

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Therefore, the required inequality is $(4x+10)+(2x-5)+18\leq 77$ and the solution is $x\leq 9$ .

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3 years ago

Given that (x + 2) is a linear factor of the polynomial x3 + 4x2 + x – 6, what are the other two linear factors?A. (x – 1) and (

kkurt [141]

The other two linear factors of the polynomial x³ + 4x² +x -6 are; Choice A: (x – 1) and (x + 3)

<h3>Polynomial division</h3>

By ling division of polynomials, it follows that the division of polynomial x³ + 4x² +x -6 by x +2 yields the quadratic expression;

x² + 2x -3.

On this note, the factorisation of the quadratic expression above yields factors;

(x – 1) and (x + 3)

Read more on factorisation of polynomials;

brainly.com/question/280849

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2 years ago