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Which of the following is zero? 1 X 10 (0 +1) /3 (3 - 3)/3 3 + 0 |
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Answer» i) x− x 1 =3 ⇒x −3x−1=0 ⇒x= 2a −B± b 2 −4ac
⇒a=1,b=−3,c=−1 ⇒x= 2 3± 9+4
⇒x= 2 3± 13
II) (x+4) 1 − (x−7) 1 = 30 11
⇒ (x+4)(x−7) (x−7−x−4) = 30 11
⇒ (x+4)(x−7) −11 = 30 11
⇒−30=x 2 −3x−28 ⇒x 2 −3x+2=0 ⇒x 2 −2x−x+2=0 ⇒x(x−2)−1(x−2)=0 ⇒(x−2)(x−1)=0 ⇒x=1,2 Step-by-step EXPLANATION: |
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