Question

解方程√5(x^2-7/2)=5√2求大神帮助

Answer 1

5(x^2-7/2)^2=50 (x^2-7/2)^2=10 x^4-7x^2+49/4=10 x^4-7x^2+9/4=0 (x^2-3/2)^2-4x^2=0 (x^2-3/2-2x)(x^2-3/2+2x)=0