Math, asked by shivasinghmohan629, 1 month ago

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Answered by jadhavparth104
0

Question:

4x² - x - 5

Step-by-step explanation:

⟹ x = -b ± √(b² - 4ac)/2a  

⟹ x = -1 ± √[1 - (4) (4) (-5)]/2(4)  

⟹ x = -1 ± √[1 - (-80)]/8  

⟹ x = -1 ± √[1 + 80]/8  

⟹ x = -1 ± √[81]/8  

⟹ x = -1 ± 9/8

Either:  

⟹ x = 1  

or:  

⟹ x = - 5/4

Verification:  

⟹ α + β = -b/a  

⟹ 1 + -5/4= -(1)/4  

⟹ 4 - 5/4 = -1/4  

⟹ -1/4 = -1/4

Now:  

⟹ αβ = c/a  

⟹ 1 × -5/4 = -5/4  

⟹ -5/4 = -5/4   Ans.

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Answered by mandalsamir05
1

Step-by-step explanation:

HOPE THIS HELPS YOU

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