Find the value of c for which the equation 4x²+c=20x has equal roots
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So your answer is twenty five.
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4x2 -20x +c
d = b2 -4ac
d= (20)2 -4 ×4×c
d = 400 -16c
for equal roots
d =0
400-16c =0
16c=400
c= 400 \16
c=25
d = b2 -4ac
d= (20)2 -4 ×4×c
d = 400 -16c
for equal roots
d =0
400-16c =0
16c=400
c= 400 \16
c=25
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