If f(x)=x2+ 2x-5 and g(x)=5x+30,then the roots of the quadratic equation g[f(x)]=0 will be??
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f(x)=x2+2x-5
this is a quadratic equation. after solving this we have
x=4+root 24 /2
or 4+ root 24/2.....(1)
now we have
g[f (x)]=5 (value of eq. 1) + 30
=>20 - 5 × root 24/2 +30
=20 + 60 - root 24/2
=> 80 - root 24/2
hopes this will help u....☆☆☆☆☆
this is a quadratic equation. after solving this we have
x=4+root 24 /2
or 4+ root 24/2.....(1)
now we have
g[f (x)]=5 (value of eq. 1) + 30
=>20 - 5 × root 24/2 +30
=20 + 60 - root 24/2
=> 80 - root 24/2
hopes this will help u....☆☆☆☆☆
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