Maths Olympiad Exam Numerical Ability Quadratic Equations

determine the value of p for which the quadratic equation 2x^2+px+8=0 has real roots

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Ans is p=-10
when p value is -10 the funcyion has real values 1,4
10 years agoHelpfull: Yes(0) No(0)

p=8. 2x^2+8x+8=0
x^2+4x+4=0
(x+2)^2=0 x=-2 is a real root.
10 years agoHelpfull: Yes(0) No(0)

Maths Olympiad Other Question

2x-3y=7 and (a+b)x-(a+b-3)y=4a+b represents coincident lines find the value of a and b for what value of m the equation 2mx^2-2(1+2m)x+(3+2m)=0 have equal roots