ICSE Class 10 Answered
25x^2+30x+7=0
solve by formula
![question image](http://images.topperlearning.com/topper/new-ate/top_mob15910785381042316571e531dffa-52b7-4693-8a92-bb501bcb359d.jpg)
Asked by saurabhchaddha4205 | 02 Jun, 2020, 11:45: AM
Given quadratic equation is 25x2+30x+7=0
Here, a=25, b=30 and c=7
Using quadratic formula, we have
![x equals fraction numerator negative b plus-or-minus square root of b squared minus 4 a c end root over denominator 2 a end fraction
equals fraction numerator negative 30 plus-or-minus square root of left parenthesis 30 right parenthesis squared minus 4 left parenthesis 25 right parenthesis left parenthesis 7 right parenthesis end root over denominator 2 cross times 25 end fraction
equals fraction numerator negative 30 plus-or-minus square root of 900 minus 700 end root over denominator 50 end fraction
equals fraction numerator negative 30 plus-or-minus square root of 200 over denominator 50 end fraction
equals fraction numerator negative 30 plus-or-minus 10 square root of 2 over denominator 50 end fraction
equals fraction numerator negative 3 plus-or-minus square root of 2 over denominator 5 end fraction](https://images.topperlearning.com/topper/tinymce/cache/a6bc236005b0870ea59a3e8fcfbb6ac2.png)
Answered by Renu Varma | 02 Jun, 2020, 13:26: PM
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