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Solve 3x? +6x4=0 Solving @ Math by Matching Method and Formula Method
If the original title is 3x 2+6x+4 = 0.

The discriminant △ = 6 2-4 * 3 * 4 =- 120, so the original equation has two unequal real roots.

Scheme 1, matching method:

3(x+ 1)^2-3-4=0.

3(x+ 1)^2=7.

(x+ 1)^2=7/3.

x+ 1= (√2 1)/3。

x 1 =- 1+(√2 1)/3。

x2=- 1-(√2 1)+/3。

Scheme 2, formula method:

x 1,2={-6 √[(6^2-4*3*(-4)]}/(2*3).

=(-6 √84)/6.

=(-6 2√2 1)/6.

x 1 =- 1+(√2 1)/3;

x2=- 1-(√2 1)/3。