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CBSE Class 11-science Answered

If ax^2+bx+c has no real roots then? a(a+b+c)>0 (a+b+c)>0 b(a+b+c)>0
Asked by aahnik.mohanty | 19 Jun, 2019, 09:05: PM
answered-by-expert Expert Answer
ax2+bx+c =0
does not have real roots hence its graph will be above x axis or below x axis
 
for a>0
f(1)>0
a+b+c>0
so,
a(a+b+c)>0
 
for a<0
f(1)<0
a+b+c<0
so,
a(a+b+c)>0
 
so, ans is a(a+b+c)>0
Answered by Arun | 20 Jun, 2019, 09:45: AM

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