10x2 + 3x – 4 = 0


(xvi) 10x2 + 3x – 4 = 0 

Sol. 10x2 + 3x – 4 = 0

 10x2 + 8x – 5x – 4 = 0

2x (5x + 4) – 1 (5x + 4) = 0

(5x + 4) (2x – 1) = 0

5x + 4 = 0 or 2x – 1 = 0

5x = – 4 or 2x = 1

x = –4/5  or x = 1/2

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