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jonny [76]
3 years ago
10

Q # 6 please multiply help

Mathematics
1 answer:
Mkey [24]3 years ago
3 0
This is a problem of Difference-of-squares. We know that for a difference of squares a^2-b^2 the factorization is given by:

(a-b)(a+b)

To learn this you need to remember that a <em>difference</em> means <em>subtraction.</em> So applying those concepts we can solve this problem step by step.

Applying distributive property:

(2n)(2n-2)+2(2n-2)

Applying distributive property again:

4n^2-4n+4n+4

Simplifying:

4n^2-4

<em>The correct answer is C</em>
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Without solving determine the number of real solutions for each quadratic equation
seropon [69]

Answer:

b^2-4b+3=0

b²-3x-b+3=0

b(b-3)-1(b-3)=0

(b-3)(b-1)=0

either

b=3 or b=1

.

2n^2 + 7 = -4n + 5

2n²+4n+7-5=0

2n²+4n+2=0

2(n²+2n+1)=0

(n+1)²=0/2

:.n=-1

.

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

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

0=5+x+2x²

2x²+x+5=0

comparing above equation with ax²+bx +c we get

a=2

b=1

c=5

x={-b±√(b²-4ac)}/2a ={-1±√(1²-4×2×5)}/2×1

={-1±√-39}/2

3 0
3 years ago
(5.4×10^2)(2.5×10^8)
mariarad [96]

(5.4×10^2)(2.5×10^8)

= (5.4 x 2.5) (10^2 × 10^8)

= 13.5 x 10^10

= 1.35 x 10^11

7 0
3 years ago
Matt's Ice Cream Shoppe has 7 cups of sprinkles to use on sundaes for the rest of the day. If each sundae is served with
igor_vitrenko [27]
I think it is 63 because 1/8 multiplied by 8 gives you 1 cup then multiply by 7 to give you the amount the company can sell
6 0
3 years ago
Determine which system below will produce infinitely many solutions.
Travka [436]
3x - y = 14

-9x + 3y = -42...divide by -3
3x - y = 14...same as first equation....means same line...means infinite solutions

answer is : 3rd answer choice
6 0
4 years ago
Read 2 more answers
PLEASE HELP DUE IN 20 MINUTES!!!<br>about cylinders ​
Andru [333]

Answer: Diameter = 4 cm

Step-by-step explanation:

20π = (π)(r^2)(5)

divide by 5 * π

4 = r^2

find the square root of both sides

2 = r

2 * 2 = d

4 = d

3 0
3 years ago
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