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2 years ago

-2.7f + 0.3f - 16 - 4=

Mathematics

1 answer:

suter [353]2 years ago

3 0

Answer:

-2.4f or -8 1/3

Step-by-step explanation:

I am not sure what should be at the end of the equal sign but if it is to simplify it would be -2.4f-20

If you want to solve then you get -2.4f=20 so f=-20/2.4 which equal to -8 1/3

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2 years ago

How to find imaginary zeros anf real zeros of F(x)=-4x^5-8x^3+12x

Fofino [41]

Answer:

$x=\{0, -1, 1, -i\sqrt{3}, i\sqrt{3}\}$

Step-by-step explanation:

We are given the function:

$f(x)=-4x^5-8x^3+12x$

And we want to finds its zeros.

Therefore:

$0=-4x^5-8x^3+12x$

Firstly, we can divide everything by -4:

$0=x^5+2x^3-3x$

Factor out an x:

$0=x(x^4+2x^2-3)$

This is in quadratic form. For simplicity, we can let:

$u=x^2$

Then by substitution:

$0=x(u^2+2u-3)$

Factor:

$0=x(u+3)(u-1)$

Substitute back:

$0=x(x^2+3)(x^2-1)$

By the Zero Product Property:

$x=0\text{ and } x^2+3=0\text{ and } x^2-1=0$

Solving for each case:

$x=0\text{ and } x=\pm\sqrt{-3}\text{ and } x=\pm\sqrt{1}$

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2 years ago

MARK AS BRAINLIEST!!!

liq [111]

Answer:

Part A

it supposed to be x⩾-1/3 since you divided by negative

Step-by-step explanation:

Part A

4-6x⩾-15x+1

step 1: add -6x to both sides

4-6x+6x⩾-15x+6x+1

=4⩾-9x+1

step 2: subtract 1 from both sides

4-1⩾-9x+1-1

3⩾-9x

step 3: do reflexive property and divide

3⩾-9x

= <u>-9x⩽3</u>

-9

x⩽-1/3

and since you divided by negative, the sign must change. so it'll be x⩾-1/3

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