Math, asked by tiwaribhavana888, 8 months ago

please answer this with step by step explanation I will definitely make you as a brain list

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Answers

Answered by lucky1924
0

Answer:

the roots are

 - 7 +  \sqrt{17}  \div 4and  - 7 -  \sqrt{17}  \div 4

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Answered by has42000
0

Answer:

Step-by-step explanation:

 2x^{2}  + 7x + 4 = 0\\

here a = 2,  b = 7 and c = 4

D = b² - 4ac ( quadratic formula)     D = discriminant

   = (7)² - 4 x 2 x 4

   = 49 - 32

   = 17

√D = √17

∴ here D is positive irrational number so both roots are distinct and irrational.

Roots = x = -b ±√D / 2a

                = -7 ±√17 / 2(2)

               = -7 ±√17 / 4

∴   x = \frac{-7 + \sqrt{17} }{4}   ====> and   ====>   x = \frac{-7 - \sqrt{17} }{4}  \\

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