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x(x+9)=0
x=?
What does x have to be for the answer to be 0?


Sagot :

Xhade
when we solve the equation it will become
x
² + 9x= 0
now here a = 1 , b = 9 and c = 0 
by using quaderatic formula
x = -b +,-
²- 4ac / 2a     ( 2a is divided by all terms )
by putting values
x = - 9 +,
81 / 2(1)               ( 81 = 9)
x = -9 + 9 / 2    and x = -9 -9 /2
x = 0                and x = -18 /2 = -9  
now there are two values for x one is- 9 and other is 0 
so we put -9 as the value of x then answer will be zero..
[tex]x(x+9)=0\\ x=0 \vee x=-9[/tex]