What's...factorise: 25x²-y²?
Answers
Answer 1
Answer:
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
(5x - y) (5x+y)
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
(5x - y) (5x+y)
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Answers
d/dx sec x=d/dx 1/cos x= sec x tan x
Answers
the answer is -9 because when you have a negative and you subtract the answer is negative
-9 because - minus a - equals a -
Answers
The explorer Christopher Columbus made four trips across the Atlantic Ocean from Spain: in 1492, 1493, 1498 and 1502. He was determined to find a direct water route west from Europe to Asia, but he never did. Instead, he accidentally stumbled upon the Americas..
So basically he was the first explorer to find America.
So basically he was the first explorer to find America.
Answers
17.5
Divide 7 by 8 to get .875 and multiply that by 20 to get your answer.
Divide 7 by 8 to get .875 and multiply that by 20 to get your answer.
We should just multiply both of them together
× 20
A whole number is always the numerator not the denominator
=
=
=17.5
A whole number is always the numerator not the denominator
=
=
=17.5
Answers
Hi there,
So lets look at this problem. Ron has 20 pennies. Pam has 20 pennies. If Ron has 4 groups each group will have 5 pennies to add up to 20. Pam will have 5 groups and each group will have 4 pennies to add up to 20.
Therefore Ron will have more pennies in his group.
So lets look at this problem. Ron has 20 pennies. Pam has 20 pennies. If Ron has 4 groups each group will have 5 pennies to add up to 20. Pam will have 5 groups and each group will have 4 pennies to add up to 20.
Therefore Ron will have more pennies in his group.
Answers
tenths means 1/10
hunderths means 1/100
how many 1/100 makes 4/10?
1/100 times what=4/10
multiply both sides by 100/1
what=400/10=40
answer is 40 hunderths=4 tenths
hunderths means 1/100
how many 1/100 makes 4/10?
1/100 times what=4/10
multiply both sides by 100/1
what=400/10=40
answer is 40 hunderths=4 tenths
40 Hundreths=4 Tenths