Question

find the value of a for which quadratic equation 5x^2-4ac+7=0 has equal root
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Answer 1

EQUAL ROOTS MTLB,

D = O => 4AC =0

5X²_4AC +7=0

5X² _ 0 =_7

X² = _7/5

X= ROOT _7/5

ROOTS ARE IMAGINERY ....

X= +ROOT (7/5 )i and _Root (7/5)i....

i = root _1 ....

Hope u got it ...

thank u ...