show that x²+3x+(x²-2²)²is not a quadratic equations
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x²+3x+(x²-4)²
x²+3x+(x²)²+16-2*4*x²
x²+3x+x⁴+16-8x²
x⁴-7x²+3x+16
this equation's highest power i. e. degree is 4
therefore,
it is not quadratic
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=x²+3x+(x²-2²)²
=x²+3x+(x²-4)²
=x²+3x+(x²)²-2×x²×4+(4)²
=x²+3x+x⁴-8x²+16
=x⁴-7x²+3x+16
From above calculation we get that it is not a quadratic equation because 4 is the highest degree of this equation
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