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(x+2)³=2x(x²-1) Give me answer |
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Answer» We know that the general form of quadratic equation is\xa0ax2+bx+c=0.The given equation is\xa0(x+2)3=2x(x2−1)\xa0can be simplified as follows:\xa0(x+2)3\xa0= 2x(x2−1)⇒x3+23+(3×x×2)( x+2)=2x3−2x (∵(a+b)3=a3+b3+3ab(a+b))⇒x3+8+6x(x+2)=2x3−2x⇒x3+8+6x2+12x=2x3−2x⇒x3+8+6x2+12x−2x3+2x=0⇒−x3+6x2+14x+8=0Since the variable\xa0x\xa0in the equation\xa0−x3+6x2+14x+8=0\xa0has degree\xa03, therefore, it is not of the form\xa0ax2+bx+c=0.Hence, the equation\xa0(x+2)3=2x(x2−1)\xa0is not a quadratic equation. thank u |
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