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natulia [17]
3 years ago
10

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

Mathematics
2 answers:
Nostrana [21]3 years ago
8 0
x(x+9)=0\\
x=0 \vee x=-9
yaroslaw [1]3 years ago
5 0
<em>when we solve the equation it will become
x</em>² + 9x<em>= 0
now here a = 1 , b = 9 and c = 0 
by using quaderatic formula
x = -b +,-</em>√<em>b </em>²<em>- 4ac / 2a     ( 2a is divided by all terms )
by putting values
x = - 9 +,</em><em>- </em>√<em>81 / 2(1)               ( </em>√<em>81 = 9)</em><em>
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..</em>
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