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x²-2x+7

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x²-2x+7

Posted by Sachin Parmar 4 years, 1 month ago

CBSE > Class 10 > Science

3 answers

Sunil Vin 4 years, 1 month ago

This equation is a Quadratic equation (in form a x 2 + b x + c = 0 ) Use the Quadratic formula: x = − b ± √ b 2 − 4 a c 2 a In this case a = 1 , b = 2 , c = − 7 Substitute the values: → x = − 2 ± √ 2 2 − 4 ( 1 ) ( − 7 ) 2 ( 1 ) → x = − 2 ± √ 4 − ( − 28 ) 2 → x = − 2 ± √ 4 + 28 2 → x = − 2 ± √ 32 2 → x = − 2 ± √ 16 ⋅ 2 2 → x = − 2 ± 4 √ 2 2 → x = − 2 2 ± 4 √ 2 2 → x = − 2 2 ± 4 √ 2 2 ⇒ x = − 1 ± 2 √ 2

0Thank You

Parth Chaturvedi 4 years, 1 month ago

roots or zeroes of the given eq. are imaginary

2Thank You

Sachin Parmar 4 years, 1 month ago

Caco³+co²

4Thank You

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