Question

Write -2x 2(-5x 2 +4x 3) in standard form.

Answer 1

Do you still need this?

Answer 2

there are -2x^2 and inside parentheses -5x^2 ???

Answer 3

Yes

Answer 4

do you can multiplie these terms inside parentheses by -2x^2 ?

Answer 5

Write -2x^2(-5x^2 +4x^3) in standard form.

Answer 6

yes this is ok. but you need multiplie them firstly

Answer 7

I multiply them by each other?

Answer 8

A.
-8x5 - 20x4

B.
-8x5 + 10x4

C.
-7x + 2x4

D.
-7x5 - 10x4

Answer 9

Write -2x^2(-5x^2 +4x^3) in standard form.

Answer 10

or than just this inside parentheses you need writing so than you need just changing this place of 4x^3 and -5x^2

Answer 11

so than will be -2x^2(4x^3 -5x^2) = ?

Answer 12

Why do they change places

Answer 13

because always the greater range need being firstly like x^3 and after this the x^2
do you remember a quadratic is ax^2 +bx +c and not invers bx +ax^2 +c
yes ?

Answer 14

Yes I remember

Answer 15

so than this will be a standard form and after this just you need multiplie them ok. ?

Answer 16

It always goes in order by whatever has the highest degree. The degree is the exponents added up.

Answer 17

I get 8x^5-10x^4

Answer 18

ehh almost..

Answer 19

Is it a plus sign instead of the -

Answer 20

When you multiply \[-2x^2(-5x^2+4x^3) \]

Answer 21

you multiply -2x^2 and -5x^2 which gives you a positive 10x^4

Answer 22

I though the -5x^2 and the 4x^3 changed places

Answer 23

then you multiply -2x^2 and +4x^3 which is negative 8x^5.

Answer 24

no

Answer 25

they stay the same

Answer 26

Oh the other person told me that

Answer 27

Is it b ?

Answer 28

So right now you have \[10x^4 -8x^5 \]

Answer 29

what is b?

Answer 30

A.
-8x5 - 20x4

B.
-8x5 + 10x4

C.
-7x + 2x4

D.
-7x5 - 10x4

Answer 31

okay, yes because when you have 10x^4 it has a degree of 4 and -8x^5 has a degree of 5. So you switch -8x^5 with 10x^4 and you get -8x^5+10x^4.. When you do anything like this, you have to pay attention to the sign.

Answer 32

Oh okay thank you so much !!! I really appreciate it

Answer 33

no problem, always here to help. If you want to fan me, you can always ask me a question when you have one.