Bình phương hai vế lên ta được:
x2+2x-2+4(x2+2x-2)=(x+2)2
<=>x2+2x-2+4x2+8x-8=x2+4x+4
<=>x2+4x2-x2+2x+8x-4x-2-8-4=0
<=>4x2+6x-14=0
<=>2x2+3x-7=0
Đến đây bạn tự làm tiếp nha. Nhớ k cho mk đấy
Giai phuong trinh ; 2\(\sqrt{x^2-x}-2\sqrt{x}\sqrt{2x-1}+3x=1\)
Giai phuong trinh :\(\sqrt{2-x^2+2x}+\sqrt{-x^2-6x+8}=1+\sqrt{3}\)
x2+ 2018\(\sqrt{2x^2+1}=x+1+2018\sqrt{x^2+x+2}\)
Giai phuong trinh
giai phuong trinh \(\sqrt{2x^2+11x+19}+\sqrt{2x^2+5x+7}=3\left(x+2\right)\)
giai phuong trinh \(\sqrt{\frac{x+7}{x+1}}+8=2x^2+\sqrt{2x-1}\)
giai phuong trinh:
\(\left(\sqrt{x+4}-2\right)\left(\sqrt{4-x}+2\right)=2x\)
\(\sqrt{x^2-2x+1}=2x\)
giai phuong trinh
giai phuong trinh : \(2x^2\left(5-\sqrt[3]{5x-x^3}\right)=2x^3+17x-8\)
Giai phuong trinh
\(\sqrt{x.\left(x-1\right)}+\sqrt{x\left(x+2\right)}=2x\)
