[Toán 9] Phân tích các biểu thức thành nhân tử

P

phamhuy20011801

$b, 2x-\sqrt{x}+3=2x-2\sqrt{x}+3\sqrt{x}-3=2\sqrt{x}(\sqrt{x}-1)+3(\sqrt{x}-1)$

$c, 2x-5\sqrt{x}+2=2x-\sqrt{x}-4\sqrt{x}+2=...$

$d, \sqrt{x^3}-\sqrt{x}+2x-2=\sqrt{x}(x-1)+2(x-1)=(\sqrt{x}+2)(x-1)$
 
E

eye_smile

$x\sqrt{x} + 2x\sqrt{y} + 2y\sqrt{x} + y\sqrt{y}=(\sqrt{x}+\sqrt{y})(x+y-\sqrt{xy})+2\sqrt{xy}(\sqrt{x}+\sqrt{y})=(\sqrt{x}+\sqrt{y})(x+y+\sqrt{xy})$
 
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