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# Help!! Maths homework!! watch

1. I don't understand thses questions, can someone explain how to do them:

X^2+6x-7

X^2+4x-5

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2. (Original post by lubna.saeed)
I don't understand thses questions, can someone explain how to do them:

X^2+6x-7

X^2+4x-5

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There must be a question attached e.g. factorise?
4. (Original post by Muttley79)
There must be a question attached e.g. factorise?
We have to put it into 2 brackets

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5. (Original post by lubna.saeed)
We have to put it into 2 brackets

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Yes, that's factorising a quadratic - did you do some examples in class?
6. With anything x^2 you know it will be (x )(x ) to work out the other numbers find two numbers which times together to get the last number and add to together to get the 'x' number.
7. (Original post by lubna.saeed)
I don't understand thses questions, can someone explain how to do them:

X^2+6x-7

X^2+4x-5

Posted from TSR Mobile
1) two numbers that add to make (+6) and multiply to make (-7) would be (+7,-1)
Thus the answer is (x+7)(x-1) and x = -7 or 1

2) two numbers add to make (+4) and multiply to make (-5) would be (+5, -1)
Thus the answer is (x+5)(x-1) and x = -5 or 1

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8. (Original post by Chlo.Harr)
1) two numbers that add to make (+6) and multiply to make (-7) would be (+7,-1)
Thus the answer is (x+7)(x-1) and x = -7 or 1

2) two numbers add to make (+4) and multiply to make (-5) would be (+5, -1)
Thus the answer is (x+5)(x-1) and x = -5 or 1

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You're not supposed to give full answers here.
9. (Original post by Chlo.Harr)
1) two numbers that add to make (+6) and multiply to make (-7) would be (+7,-1)
Thus the answer is (x+7)(x-1) and x = -7 or 1

2) two numbers add to make (+4) and multiply to make (-5) would be (+5, -1)
Thus the answer is (x+5)(x-1) and x = -5 or 1

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Thank you so much 😀 this helped 😊

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10. (Original post by Danny129)
With anything x^2 you know it will be (x )(x ) to work out the other numbers find two numbers which times together to get the last number and add to together to get the 'x' number.
Thanks I will use this for all the other questions 😀

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