3 years ago

Multiply (4n - 5)(2n + 5)

Mathematics

2 answers:

WINSTONCH [101]3 years ago

6 0

Answer:

-7n

Step-by-step explanation:

4-5= -1

2+5= 7

-1×7= -7

-7+n= -7n

likoan [24]3 years ago

4 0

Answer:

8n^2+10n-25

Step-by-step explanation:

it's probably wrong that's what I got tough xp

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Pls help it’s due tn

OverLord2011 [107]

Answer:

94 for the first one and 130 for the second

Step-by-step explanation:

Since A=6 and B=4

For the first one

13(6)+ 4(4)

78+16=94

For the second one

(6+4)*13

(10)*13= 130

8 0

3 years ago

3x3-27x=0<br> Solve by factoring a

Eddi Din [679]

After factoring $3x^3-27x=0$ the solutions are x=0 , x=3, x= -3

Step-by-step explanation:

We need to solve by factoring:

$3x^3-27x=0$

Solving:

$3x^3-27x=0$

Taking 3x common:

$3x(x^2-9)=0$

Now using formula $a^2-b^2=(a-b)(a+b)$

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

$3x=0\,\,and\,\,x+3=0\,\,and\,\,x-3=0\\x=0\,\,and\,\,x=-3\,\,and\,\,x=3\\$

So, After factoring $3x^3-27x=0$ the solutions are x=0 , x=3, x= -3

Keywords: Factorization

Learn more about Factorization at:

#learnwithBrainly

5 0

3 years ago

$2.25

DiKsa [7]

2.50 that is the answer

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3 years ago

Help me please i would appreciate it alot (stop answering with things like 'im not sure' just put those in the comments)

OLEGan [10]

#3 would be positive

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