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If one root is negative to other of equation 4x2–8xk–9=0 .find the value of K .

Posted by Utkarsh Vaibhav 4 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Gaurav Seth 4 years, 10 months ago

Comparing f(x) = 4x² - 8kx - 9 with ax2+bx+c we get
a=4; b=-8k and c=-9.

Since one root is the negative of the other, let us assume that the roots are p an -p.
Sum of the roots, a+(-a)=-b/a= - (-8k) / 4
0=2k
k=0

2Thank You

Bindal Ayush 4 years, 10 months ago

Hey how r i

0Thank You

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CBSE > Class 10 > Mathematics