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andrew11 [14]
3 years ago
10

What's...factorise: 25x²-y²?

Mathematics
1 answer:
Bogdan [553]3 years ago
6 0
Factorising an equation is putting it into bracket form.
This has square numbers and so needs double brackets

(5x - y) (5x+y)
If you then check this by multiplying the brackets out again you will get:
 5x^2 - 5xy + 5xy - y^2

The positive and negative 5xy's cancel each other out and you are left with its original form. Your answer is
(<span>5x - y) (5x+y)</span>
You might be interested in
Two buses leave towns 520 kilometers apart at the same time and travel toward each other. One bus travels 16 km/h slower than th
vampirchik [111]

Answer:

122 km/h

138 km/h

Step-by-step explanation:

distance = speed * time

One bus travels 16 km/h slower than the other

(s * 2)  + (s - 16)2 = 520

2s + 2s - 32 = 520

4s = 552

s = 552/4

s = 138 km/h

s - 16 = 122 km/h

3 0
3 years ago
Find the slope of the line in the graph.
hram777 [196]

Answer: m = -2

Step-by-step explanation: To get from one point to the next along this line,

we must first go down 2 units so we say that our rise is -2.

From there we move 1 unit to the left so our run is 1.

So our slope or rise over run is -2/1 or -2.

6 0
2 years ago
Find the Simple Interest: $210 at 8% for 7 years *
kenny6666 [7]

Answer:

Simple Interest=PTR/100

Step-by-step explanation:

Principle(P)=$210

Time(T)=7years

Rate(R)=8%

We have,

SI= (210*7*8)/100

=(11760)/100

=117.7

hope it helps uh

4 0
3 years ago
Jake bought a shirt and socks, originally marked $14.99 and $4.99. If both items were 20% off, how much did he pay for both of t
natta225 [31]
(15 +5)*(0.80) = 16

Jake paid ...
(3) $16
5 0
3 years ago
Read 2 more answers
Answer the question about the given function.
ira [324]
F(x) = -3x^2 - 6x - 6
(-1,-3)....x = -1 and f(x) = -3 (f(x) is the same as y)

-3 = -3(-1^2) - 6(-1) - 6
-3 = -3 + 6 - 6
-3 = -3 (correct)
yes, it is a solution
5 0
2 years ago
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