Quadratic Equations

Quantitative Aptitude (SBI-CL)

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I. 16x²+60x+14=0

II. 8y²– 77y-30=0

x > y

x ≥ y

x < y

Explanation:

16x²+60x+14=0
16x² + 56x+ 4x+14=0
8x(2x +7) + 2(2x +7)=0
(2x+7) ( 8x+2)=0
x= -7/2 , -2/8
8y²– 77y-30=0
8y² -80y+ 3y -30=0
8y( y-10) + 3(y-10)=0
(y-10) ( 8y+3)=0
y= 10, -3/8
Hence y>x

By: Amit Kumar

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