Question

If 4 is root of quadratic equation xsquare +ax-8=0 then a is

Answer 1

Step-by-step explanation:

of 4 is a root then x=4 putting the value we get

x²+ax+8=0

=>4²+4a+8=0

=>16+8+4a=0

=> 4a= -24

=>a= -6

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Answer 2

Answer:

put x=4 in the given eqn

we get,

4square +4a-8=0

16+4a-8=0

4a+16-8=0

4a+8=0

4a= -8

a= -8|2

a==-2