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secondary 3 | E Maths
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For my final ans, how do i leave my ans???? This is solving fractional equations... is it 3sf or what?
Date Posted: 5 years ago
Views: 453
Your third step it should be x² + 5x - 14 instead of x² - 2x - 14. But your fourth step is correct.
You can leave it in whole numbers and fractions.
x = (7 + √121)/6 or x = (7 - √121)/6
x = (7 + 11)/6 or x = (7 - 11)/6
x = 18/6 = 3 or x = -4/6 = -⅔
Alternatively, realise that when
3x² - 7x + 6 = 0,
(3x + 2)(x - 3) = 0 (this is done using the cross method of factorisation or by visual inspection)
3x - 2 = 0 or x - 3 = 0
3x = 2 or x = 3
x = ⅔
You can leave it in whole numbers and fractions.
x = (7 + √121)/6 or x = (7 - √121)/6
x = (7 + 11)/6 or x = (7 - 11)/6
x = 18/6 = 3 or x = -4/6 = -⅔
Alternatively, realise that when
3x² - 7x + 6 = 0,
(3x + 2)(x - 3) = 0 (this is done using the cross method of factorisation or by visual inspection)
3x - 2 = 0 or x - 3 = 0
3x = 2 or x = 3
x = ⅔
Read through the above again
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done
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If u continue this way... answer more straight to fraction.
Hope this help
Hope this help
Date Posted:
5 years ago
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