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3 years ago

(3x^3-2x^2+7)(x^3+2x) using foil method

Mathematics

1 answer:

Fantom [35]3 years ago

4 0

Answer:

x(8x-5-13x³+2x²)

Step-by-step explanation:

(3x²-5x-7x^4)-(-2x³+6x^4-5x²)

(x(3x-5-7x³))+2x³-6x^4+5x²

x(3x-5-7x³)+2x³-6x^4+5x²

x(3x-5-7x³+2x²-6x³+5x)

x(8x-5-13x³+2x²)

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Which point on the number line shows the graph of 0.5?

Bumek [7]

Answer: D

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

What is another way to write 7/8x+3/4=-6

Bess [88]

Answer:

$7x + 6 = - 48$

Step-by-step explanation:

The given expresion is

$\frac{7}{8}x + \frac{3}{4} = - 6$

We multiply through by 8 to get:

$8 \times \frac{7}{8}x + 8 \times \frac{3}{4} = - 6 \times 8$

We cancel out to obtain:

$7x + 2 \times 3 = - 6 \times 8$

We simplify to obtain:

$7x + 6 = - 48$

5 0

2 years ago

The formula for the volume of a sphere is v=4/3r3 what is the formula solved for r?

Salsk061 [2.6K]

Answer:

(3 V/ 4 pi) ^(1/3) = r

Step-by-step explanation:

The volume of a sphere is given by

V = 4/3 pi r^3

We want to solve for r

Multiply each side by 3/4

3/4 V = 4/3*3/4 pi r^3

3/4 V = pi r^3

Divide each side by pi

3/4 V/ pi = pi/pi r^3

3 V/ 4 pi = r^3

Take the cube root of each side

(3 V/ 4 pi) ^(1/3) = ( r^3) ^1/3

(3 V/ 4 pi) ^(1/3) = r

5 0

3 years ago

What to do if quadratic equation has a negative spuare root?

alex41 [277]

If the negative square root is found to be one of your solutions, then that is indicative of a pair of imaginary roots (the imaginary i). According to the conjugate rule, if you have one solution that is imaginary, you will have another but with the opposite sign. For example, if a solution to a quadratic is found to be 2 - i, then its conjugate, 2 + i is also a solution. They will ALWAYS go in pairs. Same thing with radical solutions. If one solution is found to be $3+\sqrt{5}$