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2 years ago

7

Simplify 4(2n -1) – 6n

2 answers:

Zolol [24]2 years ago

5 0

Answer:

2n-4

Step-by-step explanation:

larisa86 [58]2 years ago

4 0

Answer:

2n - 4

Step-by-step explanation:

expand brackets

8n - 4 - 6n

collect like terms

2n - 4

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Select all equations that have two solutions. a x^2=16 b 4x^2=0 c x^2=-16 d 3x+2=14 e x^2-1=24 f (x+8)(x-8)=0

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a )

${x}^{2} = 16$

$x = ± \: 4$

Two solutions.

_________________________________

b )

$4 {x}^{2} = 0$

$x = 0$

One solution .

_________________________________

c )

${x}^{2} = - 16$

$No \: \: solution.$

_________________________________

d )

$3x + 2 = 14$

$x = 4$

One solution.

_________________________________

e )

${x}^{2} - 1 = 24$

${x}^{2} = 25$

$x =± \: 5$

Two solutions.

_________________________________

f )

$(x + 8)(x - 8) = 0$

$x = - 8 \: \: or \: \: x = 8$

Two solutions .

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2 years ago