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Elden [556K]
3 years ago
8

Factorise x 2 + 2 x − 48

Mathematics
1 answer:
Hatshy [7]3 years ago
8 0

Answer:

x^2+ 2x +-48

product: -48  sum: 2

8, -6

x^2 +8x - 6x - 48

=> x(x+8) -6(x+8)

=> (x+8)(x-6)

Hope it helps...........

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Combine like terms. <br> 8x2 + 2(x2 − 1) =
podryga [215]

Answer:

Step-by-step explanation:

8x² + 2(x²-1) = 8x² + 2*x²  - 2*1

= 8x² + 2x² -2

= 10x² -2

Like terms: 8x² , 2x²

6 0
4 years ago
Read 2 more answers
Help with trig homework
velikii [3]

Answer:

x =19.2

y=29.8

Step-by-step explanation:

We will use the law of sines to solve this problem

sinA           sin B

----------- = -------------

a                     b

sin 55        sin 40

--------- = ---------------

24.5            x

Using cross products

x sin 55 = 24.5 sin 40

Divide by sin 55

x = 24.5 sin 40 / sin 55

x =19.22512011

To one decimal place

x =19.2

To find the angle opposite y, we know the three angles of a triangle add to 180

y = (180-40-55) = 85

sin 55        sin 85

--------- = ---------------

24.5            y

Using cross products

y sin 55 = 24.5 sin 85

Divide by sin 55

y = 24.5 sin 85 / sin 55

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To one decimal place

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3 0
4 years ago
The length of a rectangle is 4 more than its width. The area of the rectangle is 21m2 . What is the measure of the width?
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7 0
3 years ago
F(x)=x^2+9x-16<br><br><br> What is vertex <br><br> Axis of semetry
UNO [17]

Answer:

axis of symmetry is x=\frac{-9}{2}.

The ordered pair of the vertex is (\frac{-9}{2},\frac{-145}{4}).

Step-by-step explanation:

Your function is a quadratic.

Compare x^2+9x-16 to ax^2+bx+c.

You should see that a=1,b=9,c=-16.

The x-coordinate of the vertex or the axis of symmetry since the axis symmetry goes through the vertex can be found by computing \frac{-b}{2a}.

So here we go!

The axis of symmetry is x=\frac{-9}{2(1)}=\frac{-9}{2}.

When you write your axis of symmetry be sure to write it as an equation.

That is the axis of symmetry is x=\frac{-9}{2}.

Now that was also the x-coordinate of your vertex.  To find the corresponding y-coordinate of the vertex, plug your value for x into

y=x^2+9x-16.

y=(\frac{-9}{2})^2+9(\frac{-9}{2})-16

Put into calculator:

y=\frac{-145}{4} when x=\frac{-9}{2}

The ordered pair of the vertex is (\frac{-9}{2},\frac{-145}{4}).

5 0
3 years ago
Read 2 more answers
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