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3 years ago

Which factoring method would be best to factor x^2 - 9?

Mathematics

1 answer:

Vinil7 [7]3 years ago

8 0

Answer:

D. difference of squares

Step-by-step explanation:

Both of the terms x^2 and 9 are squares, so their difference is the difference of squares. The factorization of that is a "special form" that can be usefully memorized.

a^2 -b^2 = (a -b)(a +b)

x^2 -9 = (x -3)(x +3)

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Tom begins his morning shift at 9:45

Murrr4er [49]

9:45 plus 3 hours goes to 12:45 pm. add 45 minutes you get 1:30PM as your answet

6 0

3 years ago

Footballs cost $22.00 each. The athletic director has $277.00 in his budget to spend on footballs there is a $13.00 shipping fee

ZanzabumX [31]

Answer:

Step-by-step explanation:

x = number of footballs he can order

22*x + 13 (shipping fee) = 277

22x = 264 Subtract 13 from both sides

x = 16 Divide both sides by 22

Our solution is 16 footballs

5 0

3 years ago

Given that the function g is defined by the rule g(x)=3-2x,determine the following

Illusion [34]

Answer:

The value of g(a) is:

g(a) = 3 - 2a

Step-by-step explanation:

Given

As the function g(x) is given by

$g(x)=3-2x$

To determine

g(a) = ?

In order to determine g(a),

substitute x = a in the function g(x) = 3 - 2x

g(x) = 3 - 2x

g(a) = 3 - 2(a)

g(a) = 3 - 2a

Therefore, the value of g(a) is:

g(a) = 3 - 2a

6 0

2 years ago

What is the discriminant of 3x^2+6x=2

IgorC [24]

$ax^2+bx+c=0\\\\the\ discriminant:\Delta=b^2-4ac\\============================\\\\3x^2+6x=2\ \ \ \ \ |subtract\ 2\ from\ both\ sides\\\\3x^2+6x-2=0\\\\a=3;\ b=6;\ c=-2\\\\\Delta=6^2-4\cdot3\cdot(-2)=36+24=\boxed{60}\leftarrow answer$

7 0

3 years ago

Write an expression that is equivalent to -2/5(15 - 20d +50)<br> Explain please!:)

valina [46]

Answer:

-26 + 4/5d

Step-by-step explanation:

-2/5 ( 15 - 2d + 50)

= -2/5 ( 65 - 2d)

= -2/5 * 65 - (-2/5) * 2d

= -26 - (-4/5d)

= -26 + 4/5d

3 0

2 years ago