The quadratic equation whose roots are the numbers having arithmetic mean 34 and geometric mean 16 is

The quadratic equation whose roots are the numbers having arithmetic mean 34 and geometric mean 16 is
  1. $x^{2}+68 x-256=0$
  2. $x^{2}-68 x-256=0$
  3. $x^{2}-68 x+256=0$
  4. $x^{2}+68 x+256=0$

Solution

Quad $E q^{n}: \rightarrow$ $A M \text { of } a, b=34$ $a+b=68$ GM of $a, b,=\pm 6$ $\begin{aligned} a, b \rightarrow \text { roots } \rightarrow \quad a b &=256 \\ x^{2}-68 x+256 &=0 \end{aligned}$

Asked in: MHT CET 2020 (19 Oct Shift 2)

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