3x2+2under root 5x-5 has real roots
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3x^2+2√5x-5
a=3 , b=2√5 , c= -5
D = b^2 - 4ac
D=(2√5)^2 - 4 ×3×(-5)
D = 20+60
D=80
because of D>= 0
so equation has real root
a=3 , b=2√5 , c= -5
D = b^2 - 4ac
D=(2√5)^2 - 4 ×3×(-5)
D = 20+60
D=80
because of D>= 0
so equation has real root
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