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3 years ago

Find the product. -3x^ 3(-2x^ 2 + 4x + 7)

Mathematics

2 answers:

larisa86 [58]3 years ago

8 0

Answer:

Step-by-step explanation:

w is the answer to all ur problems

ch4aika [34]3 years ago

3 0

For this case we must find the product of the following expression: $-3x ^ 3 (-2x ^ 2 + 4x + 7)$

We apply distributive property to the terms within parentheses:

$(-3x ^ 3 * -2x ^ 2) + (- 3x ^ 3 * 4x) + (- 3x ^ 3 * 7) =$

We take into account that:

$- * - = +\\- * + = -$

To multiply powers of the same base, put the same base and add the exponents.

$6x ^ {3 + 2} -12x ^ {3 + 1} -21x ^ 3 =\\6x ^ 5-12x ^ 4-21x ^ 3$

Answer:

Option B

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Solve the following equation <br> T/4 +7 =2.

Sindrei [870]

Answer:

T=-20

Step-by-step explanation:

first get rid of the 7

1. T/4=-5

then multiply by 4 to isolate T

2. T=-20

4 0

3 years ago

Read 2 more answers

What are the real and complex solutions of the polynomial equation? x^4-41x^2=-400. *work needed*

pickupchik [31]

<h3>Answer: x = -5, -4, 4 and 5.</h3><h3>All four zeros are real solutions.</h3>

Step-by-step explanation:

Given the polynomial equation $x^4-41x^2=-400$ .

Adding 400 on both sides to get rid 400 from right side and set 0 on right side, we get

$x^4-41x^2+400=-400+400$ .

$x^4-41x^2+400=0$ .

Factoring by product sum rule.

We need product of 400 and sum upto -41.

We can see that 400 = -25 × -16 = 400 and -25-16 = -41.

Therefore,

$x^4-25x^2-16x^2+400=0$

Making it into two groups, we get

$(x^4-25x^2)+(-16x^2+400)=0$

Factoring out GCF of each group, we get

$x^2(x^2-25)-16(x^2-25)=0$

$(x^2-25)(x^2-16) =0$

Factoring out $(x^2-25)$ and $(x^2-16)$ separately by difference of the squares identity $a^2-b^2=(a-b)(a+b)$ , we get

$(x^2-25) = x^2-5^2= (x-5)(x+5)$ and

$x^2-16 = x^2-4^2 =(x-4)(x+4)$ .

Therefore,

$(x-5)(x+5)(x-4)(x+4) =0$

Applying zero product rule,

x-5=0

x+5=0

x-4=0 and

x+4=0.

Therefore,

<h3>x = -5, -4, 4 and 5.</h3><h3>All four zeros are real solutions.</h3>

6 0

3 years ago

Circle the fraction greater than 3/10? <br><br>1/3<br><br>3/11<br><br>4/15<br><br>Or 29/100

mihalych1998 [28]

Answer:

1/3 is the only fraction here that is greater than 3/10.

Step-by-step explanation:

Convert these to decimals first, which can make it easier.

1/3 as a decimal is 0.33333333333333333333333333... which is greater than 0.3, which is 3/10.

3/11 as a decimal is 0.27272727272727.... which is LESS than 0.3, which is 3/10.

4/15 as a decimal is 0.26666666666666666666666666666666, which is less than 0.3, which is 3/10.

29/100 as a decimal is 0.29, which is less than 0.3, which is 3/10.

So the answer is 1/3.

3 0

3 years ago

A rectangle is formed by 2 congruent right triangles. The area of each triangle is 6 in^2. If each side of the rectangle is a wh

abruzzese [7]

How sad. You were going along so nicely there, with a fascinating problem
that would be fun to work on, and then you suddenly fell off over the edge.

"Which of these ..." always means "Here's a list of choices. Pick out the
correct answer from the list." So we know that there was a list of choices
right there, where you copied the question from. But when you finished
copying the question and reached the list of choices, you stopped there,
never copied the list, and went away to do something else instead.

Without that list, there's no way for us to answer the question "Which of these...".

7 0

3 years ago

Ab=16cm <br> then find the value of OA<br> answer fast pls

RUDIKE [14]

Hope you could understand.

If you have any query, feel free to ask.

3 0

3 years ago