Question

quadratic equation of (2x+x)*x=189

Answer 1

2X^2+x^2=189
3x^2=189

Answer 2

$(2x + x) \times x = 189$
$2 {x}^{2} + {x }^{2} = 189$
$3 {x}^{2} = 189$

${x}^{2} = 189 \div 3$
$x = \sqrt{189 \div 3}$
$x = 7.93$
answer