√2X2-3=7X 根号2倍X的平方减3等于7X,请问怎么解?
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√2(x^2)-3=7x
√2(x^2)-7x-3=0
2x^2-7√2x-3√2=0
x^2-7√2/2x-3√2/2=0
x^2-7√2/2x-3√2/2=0
x^2-7√2/2x=3√2/2
x^2-7√2/2x+(7√2/4)^2=3√2/2+98/16
(x-7√2/4)^2=24√2/16+49/16=(24√2+98)/16
x-7√2/4=正负√(24√2+98)/4
x=7√2加减√(24√2+98)/4
√2(x^2)-7x-3=0
2x^2-7√2x-3√2=0
x^2-7√2/2x-3√2/2=0
x^2-7√2/2x-3√2/2=0
x^2-7√2/2x=3√2/2
x^2-7√2/2x+(7√2/4)^2=3√2/2+98/16
(x-7√2/4)^2=24√2/16+49/16=(24√2+98)/16
x-7√2/4=正负√(24√2+98)/4
x=7√2加减√(24√2+98)/4
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