HOW TO SOLVE THIS PROBLEM!

[bluefire908]

a+b=10

ab=16

 

find the value of a^2+ab+b^2

 

USING IDENTITIES 

 

btw ik this place is for CPUs, CPUs are for numbers,numbers are for math(plz dont flame)

 

 

 

EDIT: well looks like i read the sum wrong , so i actually knew the answer all along.

[Guest]

a^2 + ab + b^2 = a^2 + 2ab + b^2 - ab = (a + b )^2 - ab

[juretrn]

Look into your math notes, you have surely done this in class!

 

I'll give you a hint:

a=10-b

(10-b)*b=16

 

Any help?

[dalomo]

btw ik this place is for CPUs, CPUs are for numbers,numbers are for math(plz dont flame)

Just put it in off topic. You'll get the same help there and it will actually be in the right place...

[bluefire908]

Look into your math notes, you have surely done this in class!

 

I'll give you a hint:

a=10-b

(10- B)*b=16

 

Any help?

ik that u can factorise 16 as 2x8,it seems there is some other method 

[daniellearmouth]

42.

[juretrn]

ik that u can factorise 16 as 2x8,it seems there is some other method 

I don't think you quite understand what I intended to do there:

express b from the second expression, after you do you can express a, and then you simply insert a and b into your final expression.

[bluefire908]

I don't think you quite understand what I intended to do there:

express b from the second expression, after you do you can express a, and then you simply insert a and b into your final expression.

thats what i did,

 

ab=16

a+b=10

 

so 16 can be written as 2x8

2+8=10

so 

2=a

8=b

then i inserted the values into a^2+ab+b^2

 

but the book says use identities to find the following

[juretrn]

thats what i did,

 

ab=16

a+b=10

 

so 16 can be written as 2x8

2+8=10

so 

2=a

8=b

then i inserted the values into a^2+ab+b^2

 

but the book says use identities to find the following

what you did there is more like a good guess, nothing mathematical there.

 

While I'm not sure about proper English terminology and I'm not 100% what solving with identities means, it seems probable it's meant to be done the way I did it.