Question

Kết quả phân tích thành nhân tử x - 2\(\sqrt{x}\) - 15

Answer 1

Lời giải:

$x-2\sqrt{x}-15=(x-5\sqrt{x})+(3\sqrt{x}-15)$

$=\sqrt{x}(\sqrt{x}-5)+3(\sqrt{x}-5)=(\sqrt{x}-5)(\sqrt{x}+3)$

Answer 2

\(\text{ x - 2 √ x - 15}\)

\(=x+3\sqrt{x}\)\(-5\sqrt{x}\)\(-15\)

\(=\left(x+3\sqrt{x}\right)\)\(-\left(5\sqrt{x}\right)\)\(+15\)

\(=\sqrt{x}\)\(\left(\sqrt{x}+3\right)-5\left(\sqrt{x}+3\right)\)

\(\left(\sqrt{x}+3\right)-5\left(\sqrt{x}-5\right)\)