Câu 32: Trang 19 - sách giáo khoa (SGK) toán lớp 9 tập 1Tính :a....

{
"content1": "a. $\sqrt{1\frac{9}{16}.5\frac{4}{9}.0,01} = \sqrt{\frac{25}{16}.\frac{49}{9}.\frac{1}{100}} = \sqrt{\frac{25 \times 49 \times 1}{16 \times 9 \times 100}} = \sqrt{\frac{1225}{14400}} = \frac{35}{120}",
"content2": "b. $\sqrt{1,44.1,21-1,44.0,4} = \sqrt{1,7424 - 0,576} = \sqrt{1,1664} = 1,08",
"content3": "c. $\sqrt{\frac{165^{2}-124^{2}}{164}} = \sqrt{\frac{27***6}{164}} = \sqrt{\frac{11849}{164}} = \frac{137}{4}",
"content4": "d. $\sqrt{\frac{149^{2}-76^{2}}{457^{2}-384^{2}}} = \sqrt{\frac{22***}{***56}} = \sqrt{\frac{16425}{61443}} = \frac{135}{283}"
}