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Zolol [24]
3 years ago
14

Factorising quadratics 2nd page

Mathematics
1 answer:
mihalych1998 [28]3 years ago
7 0
A^2-b^2=(a+b)(a-b)

1: x^2-4=(x+2)(x-2)
2: (x+8)(x-8)
3: (x+10)(x-10)
4: (x+14)(x-14)
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Perimeter of the triangle below ?
Paha777 [63]

Answer:

31x^2-13x

Step-by-step explanation:

to find the perimeter of a triangle, add all sides.

P=a+b+c

P=(5x^2+x)+(8x^2-3x)+(18x^2-11x)

combine like terms

5x^2+8x^2-18x^2= 31x^2

x-3x-11x= -13x

31x^2-13x

5 0
4 years ago
A population of organisms was 11560 at the beginning of a study, and by the end of the study the population was 23190. to the ne
S_A_V [24]
The answer is 11225 i think 

hope it helps you

3 0
3 years ago
What is located at (–2, –2)?
tatuchka [14]

Answer:

B. The post office

youre welcome!

5 0
3 years ago
Divide. Express the quotient in simplest form.<br> x^2−x−12/2x^2÷x^2+x−6/2x^3
sertanlavr [38]
Hey there!

These are technically expressed as fraction. When you divide a fraction by another, you can replace the second fraction with its reciprocal and you can now multiply the fractions together instead. 

\frac{x^2-x-12}{2x^2} /  \frac{x^2+x-6}{2x^3}

\frac{x^2-x-12}{2x^2} * \frac{2x^3}{x^2+x-6}

Now, just multiply across the top and the bottom. You can first cancel out any terms that are repeated or similar. 

\frac{12}{2x^2} * \frac{2x^3}{-6}

\frac{2}{x} * \frac{1}{-1}

\frac{2}{-x}

Your answer will be \frac{2}{-x}. 

Hope this helped you out! :-)
5 0
3 years ago
Read 2 more answers
Evaluate when x = 7 and y = 6<br> 2x - 37
Zarrin [17]

Answer:

-23

Step-by-step explanation:

2x - 37 =

2(7) - 37 =

14 - 37 =

-23

5 0
3 years ago
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