If x = -3 ,find the valve of : x² + 2
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1
x=0 , 5
x
2
+7x−2x
2
−2x=0
⇒ −x
2
+5x=0
⇒ −(x
2
−5x)=0
⇒ x
2
−5x=0
⇒ x(x−5)=0
⇒ x=0 and x−5=0
∴ x=0 and x=5
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