Check whether following equation is a quadratic equation or not:
(x + 2)3 = (x + 5)(x2 – 1)
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Answer:
yes
it is a quadratic equation.
(x+2)³=(x+5)(x²-1)
x³+8+6x²+18x=x³+5x²-x-5
8+6x²+18x-5x²+x+5=0
x²+19x+13
so,it is a quadratic equation.
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