Question

根号2X平方-4X=4倍根号2

Answer 1

√2x^2-4x=4√2

√2x^2-4x-4√2=0

因为：a=√2 ,b=-4 ,c=-4√2

b^2-4ac=16+32=48

x=(4+-4√2)/√2

x1=2√2+4 x2=2√2-4