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KatRina [158]
3 years ago
15

How to factorise 5x square -20?

Mathematics
1 answer:
iren [92.7K]3 years ago
7 0

Answer:

5(x² - 4)

Step-by-step explanation:

5x² - 20

5 can divide both 5 and 20, 5x²/5 and -20/5 = x² and -4

5(x² - 4), to know if you are correct, multiply 5 by the bracket and you get the question back

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For the function: f(x) = 21 + 2x − 5x2<br> Find f(3)
allochka39001 [22]
F(3)=-18

You just replace x for three for your equation and then use Ofer of operations to solve it.

So f(3)= 21+ 2(3)-5(3)^2

The exponent goes first: f(3)= 21+ 2(3)-5(9)

Next is multiplication: f(3)= 21+ 6-45

Now add: f(3)= 27-45

Finally subtract: f(3)= -18

Hope this helps!
6 0
4 years ago
Plaz guys help me on this question additional mathematics ​
Soloha48 [4]

Answer:

Step-by-step explanation:

vector OA=a

vector OB=b

vector OX= λ vector OA=λa

vector OY=μ vector OB=μb

a.

1.vector BX=(vector OX-vector OB)=λa-b

ii. vector AY=(vector OY-vector OA)=μb-a

b.

5 vector BP=2 vector BX

5(vector OP-vector OB)=2 (vector OX-vector OB)

5(vector OP-b)=2(λa-b)

5 vector OP-5b=2λa-2b

5 vector OP=2λa-2b+5b

vector OP=1/5(2λa+3b)

ii

complete it.

4 0
4 years ago
AHHHH PLEASE HELP if this isn't right please tell me the answer
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⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠀ ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠀ ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

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Which volume formula(s) could be used to calculate the volume of a rectangular
photoshop1234 [79]

Given:

The given volume formulas to calculate the volume of a rectangular

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To find:

The correct volume formula.

Solution:

The volume of a rectangular pyramid is:

V=\dfrac{1}{3}Bh

Where, B is the base area of the rectangular pyramid and h is the vertical height of the rectangular pyramid.

Therefore, the correct volume of a rectangular pyramid is V=\dfrac{1}{3}Bh.

Note: In the given problem, the options are not in correct form.

3 0
3 years ago
What is the slope of the line shown?
mylen [45]

Answer:

3

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