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secondary 2 | Maths
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Hi, are the workings for the questions above correct?
Date Posted: 3 years ago
Views: 233
2a) is correct. But if you don't want the negative sign outside, rewrite it as (2x + 3)(4 - x)
There is a little typo error in your working for the cross method of factorisation. It should be -8x instead of -6x
There is a little typo error in your working for the cross method of factorisation. It should be -8x instead of -6x
For 2b) you can rewrite it as 3(1-2a)(1+2a) if you don't want the negative sign beside the first term in the second bracket you wrote.
3(1 - 4a²)
= 3(1² - (2a)²)
= 3(1 - 2a)(1 + 2a)
(Using the property a² - b² = (a + b)(a - b) )
3(1 - 4a²)
= 3(1² - (2a)²)
= 3(1 - 2a)(1 + 2a)
(Using the property a² - b² = (a + b)(a - b) )
The rest look fine to me.
Thank you
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done
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for questions 2a and 2b, try to factorise out the negative signs as well
Date Posted:
3 years ago
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