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CBSE Class 12-science Answered

It is given that 'a'>0 and b^2-ac <0 then what can you say about symbol of the quadratic  equation (ax^2+bx+c )WILL IT BE POSITIVE OR NEGATIVE? Please explain reason also
Asked by govtsecschoolnayaganv051 | 23 Sep, 2019, 04:39: PM
answered-by-expert Expert Answer
Given a>0 and b2-ac<0
rightwards double arrow b squared less than a c
S i n c e comma space b squared greater than 0
rightwards double arrow a c greater than 0
A n d space a s space a greater than 0 space rightwards double arrow c greater than 0 rightwards double arrow a c less than 4 a c
rightwards double arrow b squared less than 4 a c space rightwards double arrow space b squared minus 4 a c less than 0
S o space w e space h a v e space a greater than 0 space a n d space b squared minus 4 a c less than 0
H e n c e comma space a x squared plus b x plus c greater than 0
Answered by Renu Varma | 24 Sep, 2019, 10:34: AM
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