whose product is+15 and whose sum is -8???

- anonymous

whose product is+15 and whose sum is -8???

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- schrodinger

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- anonymous

Ok, so when you multiply two negatives it equals a positive, right?

- anonymous

yeh

- anonymous

So, then how do you get 15 when multiplying 2 negative numbers?

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## More answers

- anonymous

no that is the question

- anonymous

Okay, how do you get 15 when multiplying 2 positive numbers?

- anonymous

5*3

- anonymous

So, since a negative times a negative is a positive, what are the numbers now?

- anonymous

thank you

- anonymous

Your welcome! ☺

- anonymous

And so, -5x-3= 15 and -3+-5= -8 !!

- anonymous

Is that all you need help with?

- anonymous

whose product is -6 and whose sum is +1

- anonymous

3*2

- anonymous

thanks you done it again

- anonymous

okay, so if you want those 2 numbers to have a sum of 1, which number do you turn negative?

- anonymous

2

- anonymous

good!

- anonymous

so -2x3 = -6 and -2+3 = 1

- anonymous

whose product is -12 and whose sum is -4

- anonymous

How can you get 12 when multiplying 2 positive numbers?

- anonymous

3*4

- anonymous

well, that and 2x6

- anonymous

thanks

- anonymous

So, which number do you turn negative to get a sum of -4?

- anonymous

-6

- anonymous

Good!

- anonymous

whose product is -12 and whose sum is -4

- anonymous

sorry wrong one

- anonymous

whose product is -16 and whose sum is 0

- anonymous

How do you get 16 when multiplying 2 positive numbers (that are the same) ?

- anonymous

4

- anonymous

thank you

- anonymous

Now you need to make 1 negative, and if you add -4 +4 what do you get?

- anonymous

0

- anonymous

what about 4-4

- anonymous

0

- anonymous

okay thank you but it says sum doesnt that matter

- anonymous

Sum is addition!

- anonymous

So it doesn't matter, but adding a negative is like subtracting a positive!

- anonymous

doesnt it not count as minus (because i heard my teacher say something like that)

- anonymous

okay

- anonymous

okay next q

- anonymous

What grade are you learning this in?

- anonymous

9

- anonymous

in the uk

- anonymous

Okay

- anonymous

What is that equivalent to in the us?

- anonymous

|dw:1362327623653:dw| +5x +6

- anonymous

Huh?

- anonymous

i dont know

- anonymous

|dw:1362327701244:dw|

- anonymous

factorrise

- anonymous

I don't know what your asking, please copy the question directly ☺

- anonymous

x squared +5x+6

- anonymous

What do you need to do with it?

- anonymous

factorise

- anonymous

okay.

- anonymous

http://www.mathsisfun.com/algebra/factoring.html read this, it may help you understand it better!

- anonymous

Did you read it?!

- anonymous

yes

- anonymous

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