For a quadratic equation \( a x^{2}+b x+c=0 \), if \( a+b \) \[ +c=0, \text { then } x=1 \text {...

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For a quadratic equation \( a x^{2}+b x+c=0 \), if \( a+b \)
\[
+c=0, \text { then } x=1 \text {. (True/False) }
\]
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