check whether the following are quadratic equation: (x+2)^3= 2x(x^2-1)
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Answer:
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Step-by-step explanation:
(x+2)³=2x(x²-1)
= x³+8 = 2x³-2x
= x³+8-2x³+2x = 0
= x³-2x³+2x+8 = 0
= -x³+2x+8 = 0
quadrative equation should be in form of "ax²+bx+c = 0"
since, "-x³=2x+8 = 0" not in form of ax²+bx+c = 0
∴ "-x³=2x+8 = 0" is not quadrative equation
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