4 years ago

Simplified form of the expression (x^3+3x^2+6)-(9x^2-5x+7)

Mathematics

1 answer:

JulijaS [17]4 years ago

8 0

$(x^3 + 3x^2 + 6) - (9x^2 - 5x + 7)\\\\x^3 + 3x^2 + 6 - 9x^2 + 5x - 7\\x^3 - 6x^2 + 5x -1$

You might be interested in

If <img src="https://tex.z-dn.net/?f=x-12%5Csqrt%7Bx%7D%20%2B36%3D0" id="TexFormula1" title="x-12\sqrt{x} +36=0" alt="x-12\sqrt{

Elis [28]

Answer:

x = 36

Step-by-step explanation:

$x - 12\sqrt{x} + 36 = 0$

Subtract x and 36 from both sides.

$-12\sqrt{x} = -x - 36$

Divide both sides by -1.

$12\sqrt{x} = x + 36$

Square both sides.

$144x = x^2 + 72x + 1296$

Subtract 144x from both sides.

$0 = x^2 - 72x + 1296$

Factor the right side.

$0 = (x - 36)^2$

$x - 36 = 0$

$x = 36$

Since the solution of the equation involved squaring both sides, we musty check the answer for possible extraneous solutions.

Check x = 36:

$x - 12\sqrt{x} + 36 = 0$

$36 - 12\sqrt{36} + 36 = 0$

$36 - 12\times 6 + 36 = 0$

$36 - 72 + 36 = 0$

$0 = 0$

Since 0 = 0 is a true statement, the solution x = 36 is a valid solution.

6 0

4 years ago

Following an experiment, Jamie estimates that his probability of making a three-pointer with a basketball is 0.8. If he shoots 1

dem82 [27]

Multiply the number of attempts with the probability,
160 x 0.8 = 128 attempts made.

Hope this helps.

6 0

3 years ago

Read 2 more answers

At the candy store, Jonathan bought 1.74 pounds of gumdrops, 2.2 pounds of jellybeans, and 1.38 pounds of licorice. How much did

GenaCL600 [577]

Answer:

5.32 lbs

Step-by-step explanation:

add all of them together, this is common sense math you should know how to do this.

3 0

3 years ago

Read 2 more answers

Write down the exact value of:<br> a) cos 60°<br> b) sin 0°<br> c) tan 45°

sergey [27]

Answer:

cos 60 1/2

sin0 0

tan45 1

Step-by-step explanation:

do it in calculator

7 0

3 years ago

Read 2 more answers

Use the distributive property to create an equivalent expression to 7(2j + 3 + 2j).

Scorpion4ik [409]

Answer:

28j + 21

Step-by-step explanation:

combine like terms

7(2j+ 3+ 2j)

7(4j+3)

Distribute

7(4j + 3)

28j + 21

6 0

3 years ago

Read 2 more answers