Đáp án: Giải phương trình (3x+1)căn x+3 = 2x^2 + 3x + 3 - (3x+1)⋅ √(x+3) = 2x^2 + 3x + 3 ⇔(3x+1)^2 (x+3)=(2x 2 +3x+3)^( 2) ⇔4x^4+3x^3-12x^2-x+6=0 ⇔(x-1)^2(4x+3)(x+2)=0 ⇔[ (l)x-1=04x+3=0 x+2=0 ⇔[ (l)x=1x=-(3/4)(ktm)x=-2(ktm) (Vậy pt có nghiệm S =(1))

(3x+1)⋅ √(x+3) = 2x^2 + 3x + 3 ⇔(3x+1)^2 (x+3)=(2x 2 +3x+3)^( 2) ⇔4x^4+3x^3-12x^2-x+6=0 ⇔(x-1)^2(4x+3)(x+2)=0 ⇔[ (l)x-1=04x+3=0 x+2=0 ⇔[ (l)x=1x=-(3/4)(ktm)x=-2(ktm) (Vậy pt có nghiệm S =(1))

Nguyễn Đại Rồng

6 tháng trước

Giải phương trình: (3x+1).căn x+3 = 2x^2 + 3x + 3

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nhiovo1234

6 tháng trước

$\left(3x+1\right)\cdot \sqrt{x+3}\:=\:2x^2\:+\:3x\:+\:3$

$⇔\left(3x+1\right)^2\:\left(x+3\right)=\left(2x\:2\:+3x+3\right)^{\:2}$

$⇔4x^4+3x^3-12x^2-x+6=0$

$⇔\left(x-1\right)^2\left(4x+3\right)\left(x+2\right)=0$

$⇔\left[ \begin{array}{l}x-1=0\\4x+3=0\quad \\\:x+2=0\end{array} \right.$ $⇔\left[ \begin{array}{l}x=1\\x=-\dfrac{3}{4}(ktm)\\x=-2(ktm)\end{array} \right.$

$\text{Vậy pt có nghiệm S ={1}}$

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Giải phương trình: (3x+1).căn x+3 = 2x^2 + 3x + 3

1 câu trả lời

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việt nam dành độc lập vào năm nào

Choose the best answer.I think you should buy _____ pack of mineral water instead. And you can also buy _____ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ______ cookies and soft candies.

Choose the best answer.We should decorate our living room with _____ orange banner. We also need ________ ribbons, balloons, party hats and costume.

Choose the best answer.I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.

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I think you should buy ___ pack of mineral water instead. And you can also buy _ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ____ cookies and soft candies.

Choose the best answer.
We should decorate our living room with _ orange banner. We also need ____ ribbons, balloons, party hats and costume.

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