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Arowojolu
- Rate €3
- Response 1h
€3/h
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- Maths
- Algebra
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Teaches for all level. And breaking all workings into simplex form. It will be very fun.
- Maths
- Algebra
- Trigonometry
- Algorithms
- Further Maths
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About Arowojolu
Am a very cool and calm teacher who loves teaching and eradicate students knowledge. I love challenging my student when it comes to Mathematics.
Because mathematics is like a puzzle game before you play,you have to think very well. At the endyouwill see that mathematics help you to think fast.
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About the lesson
- Primary School
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- +9
levels :
Primary School
Secondary School
Post-Secondary Education
1st year of Sixth Form
2nd year of Sixth Form
Adult education
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- English
All languages in which the lesson is available :
English
Find a number such that when it is successively added to 5 and subtracted from 15, the product of the two results is 96.
SOLUTION
Let the number be any variable e.g x or y
Let say we pick "x" as the number.
Then 5 is added i.e (x+5)
Also x is subtracted from 15 i.e (15-x)
Then the product of the two results is 96.
I.e (x+5)(15-x)=96
By expanding the bracket
X(15-x)+5(15-x)=96
15x-x²+75-5x-96=0
By rearranging
x²-10x+21=0
By factorization method
(x-3)(x-7)=0
Therefore x=3 or x= 7
Hence the number is 3 or 7.
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Rates
Rate
- €3
Pack rates
- 5 h: €15
- 10 h: €30
online
- €3/h
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