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Find the positive root of 3xsquare …

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Find the positive root of 3xsquare +6x-9=0

Posted by Gurdeep Kaur 5 years, 2 months ago

CBSE > Class 10 > Mathematics

2 answers

Shubham Saxena ???? 5 years, 2 months ago

3x² + 6x - 9 = 0 ,, 3x² + 9x - 3x - 9 = 0 ,, 3x ( x + 3 ) - 3 ( x + 3 ) ,, = (3x - 3 ) ( x + 3 ) = 0 ,, = x = 3/3 = 1 . ,,,, x = - 3 .,,,, First root is [ x = 1] ,, second root is [ x = - 3 ] . So , the positive root of. 3x² + 6x - 9 = 0 is 1 Ans . Thank you.

0Thank You

Yogita Ingle 5 years, 2 months ago

3x² + 6x = 9
3x² + 6x - 9 = 0
3x² + 9x - 3x - 9 = 0
3x(x + 3) - 3 (x +3) = 0
(x + 3) ( 3x - 3)= 0
x + 3 = 0 or 3x - 3 = 0
x = -3 or 3x = 3
x = -3 or x = 3/3 = 1

0Thank You

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