Question

@gorv (:

Answer 1

product rule u need to apply

Answer 2

\[\frac{ d(u*v) }{ dx }=u*\frac{ dv }{ dx }+v*\frac{ du }{ dx }\]

Answer 3

can u do that

Answer 4

yess

Answer 5

show me your work than

Answer 6

wait what would be u?

Answer 7

u can take any of the two u it is you choice

Answer 8

(-4x^2-2x) u can take it as u or v

Answer 9

im stuck, canyou explain this for me??

Answer 10

let u=(-4x^2-2x)
v=(-x^2-9)

Answer 11

u*dv/dx

Answer 12

what will be derivative of v

Answer 13

2-9-x

Answer 14

ok split it
derivative of (-x^2)

Answer 15

2-x

Answer 16

it is negative sign

Answer 17

it will be -2x

Answer 18

ohh ok gotcha

Answer 19

and derivative of 9??

Answer 20

0

Answer 21

so dv/dx=????

Answer 22

-2x/9 right?

Answer 23

loll

Answer 24

d(-x^2-9)=??

Answer 25

how u bring 9 to divison??

Answer 26

just put the derivative of -x^2 and 9 in their place

Answer 27

2-9-x

Answer 28

can u xplain how u got it ??

Answer 29

i got the derivative? isnt that what youre asking?

Answer 30

d(-x^2-9)=d(-x^2)-d(9)

Answer 31

now can u tell ??

Answer 32

ohh i was doing something else

Answer 33

oops now i know what you were asking

Answer 34

yeah tell me what u got

Answer 35

i dont know

Answer 36

what we got for (-x^2)

Answer 37

hmm take minus sign out
-(derivative of x^2)=- ???

Answer 38

@mondona

Answer 39

2x

Answer 40

yeah
so derivative of (-x^2-9)=-(derivative of x^2)- (derivative of 9)=-2x-(derivative of 9)

Answer 41

derivative of 9 =??

Answer 42

9 is 0

Answer 43

dv/dx=-2x-0=-2x

Answer 44

u*dv/dx=(-4x^2-2x)*(-2x)

Answer 45

now second one

Answer 46

v*du/dx

Answer 47

derivative of(-4x^2-2x)= - derivative(4x^2)-derivative (2x)
can u do this

Answer 48

4x^2 is 2 4x

Answer 49

2x is 1

Answer 50

2 wiil be multiplied lol

Answer 51

8x

Answer 52

d(4x^2)=2*4*x=8x

Answer 53

yeah remember it

Answer 54

ans 2x=2*x so its derivative = 2*1=2

Answer 55

canu do it now

Answer 56

du/dx=(-8x-2)

Answer 57

i just plug in -5?

Answer 58

v*du/dx=(-x^2-9)(-8x-2)

Answer 59

u*dv/dx+v*du/dx=(-4x^2-2x)*(-2x)+(-x^2-9)

Answer 60

plug in -5 in this
(-4x^2-2x)*(-2x)+(-x^2-9)

Answer 61

i got 4116...

Answer 62

Still angry with me?

Answer 63

Firstly delete unnecessary comments.. Save some OS space.. :)

Answer 64

So, honestly tell me, upto which point you are clear?

Answer 65

i want to know if i pluged it in correctly, i got a really big number

Answer 66

Wait, I check it...

Answer 67

okk

Answer 68

There is mistake somewhere in plugging.. :)
Can you show me, how you plugged?

Answer 69

(-4(-5)^2-2(-5))*(-2(-5))+(-(-5)^2-9)

Answer 70

That is really great..

Write the next step you did..

Answer 71

-2192

Answer 72

NO..

Answer 73

\((-4(-5)^2-2(-5)) \times (-2(-5))+(-(-5)^2-9)\)

Go one by one: \(-(4(-5)^2 = ??\)

Answer 74

400

Answer 75

Here is the problem you got: Reduce it further: Tell me : \((-5)^2 = ??\)

Answer 76

25

Answer 77

\(-4(25) = ??\)

Answer 78

Or you can more simplify it as : \(-(25 + 25 + 25 + 25) = ??\)

Answer 79

-100

Answer 80

Good..

Answer 81

\((-4(-5)^2-2(-5)) \times (-2(-5))+(-(-5)^2-9)\)

\((-100-2(-5)) \times (-2(-5))+(-(-5)^2-9)\)

\(-2(-5) = ??\)

Answer 82

10

Answer 83

Going good..

\(-(-5)^2 = ??\)

Answer 84

-25

Answer 85

\((-100 + 10) \times (10) + (-25-9)\)

Answer 86

-90 * 10 + 34

Answer 87

Wait..

Answer 88

-866

Answer 89

\((-90 \times 10) + (-34)\) = ??

Answer 90

How you got \(+34\) ??

Answer 91

They will add but sign will be negative only.. :)

Answer 92

Not getting?

Answer 93

sorry computer shut off

Answer 94

-34

Answer 95

-934

Answer 96

@waterineyes