a. 3√16+8√9-15√64. b. 2/3√9-3/2√36+19. c. 5.√0,16+3√0,04 03/07/2021 Bởi Piper a. 3√16+8√9-15√64. b. 2/3√9-3/2√36+19. c. 5.√0,16+3√0,04
Lời giải và đáp án: `a,` `3sqrt16+8sqrt9-15sqrt64` `=` `3sqrt(4^2)+8sqrt(3^2)-15sqrt(8^2)` `=` `3.4+8.3-15.8` `=` `12+24-120` `=` `-84` `b,` `2/3sqrt9-3/2sqrt36+19` `=` `2/3sqrt(3^2)-3/2sqrt(6^2)+19` `=` `2/3 .3-3/2 .6+19` `=` `2-3.3+19` `=` `2-9+19` `=` `12` `c,` `5sqrt(0,16)+3sqrt(0,04)` `=` `5sqrt((0,4)^2)+3.sqrt((0,2)^2)` `=` `5.0,4+3.0,2` `=` `2+0,6` `=` `2,6` Bình luận
Đáp án: `a)3\sqrt{16}+8\sqrt9-15\sqrt{64}` `=3\sqrt{4^2}+8\sqrt{3^2}-15\sqrt{8^2}` `=3.4+8.3-15.8` `=12+24-120` `=-84` `b)2/3sqrt9-3/2sqrt{36}+19` `=2/3sqrt{3^2}-3/2sqrt{6^2}+19` `=2/3*3-3/2*6+19` `=2-9+19` `=12` `c)5\sqrt{0,16}+3\sqrt{0,04}` `=5.\sqrt{(0,4)^2}+3\sqrt{(0,2)^2}` `=5.0,4+3.0,2` `=2+0,6` `=2,6` Bình luận
Lời giải và đáp án:
`a,` `3sqrt16+8sqrt9-15sqrt64`
`=` `3sqrt(4^2)+8sqrt(3^2)-15sqrt(8^2)`
`=` `3.4+8.3-15.8`
`=` `12+24-120`
`=` `-84`
`b,` `2/3sqrt9-3/2sqrt36+19`
`=` `2/3sqrt(3^2)-3/2sqrt(6^2)+19`
`=` `2/3 .3-3/2 .6+19`
`=` `2-3.3+19`
`=` `2-9+19`
`=` `12`
`c,` `5sqrt(0,16)+3sqrt(0,04)`
`=` `5sqrt((0,4)^2)+3.sqrt((0,2)^2)`
`=` `5.0,4+3.0,2`
`=` `2+0,6`
`=` `2,6`
Đáp án:
`a)3\sqrt{16}+8\sqrt9-15\sqrt{64}`
`=3\sqrt{4^2}+8\sqrt{3^2}-15\sqrt{8^2}`
`=3.4+8.3-15.8`
`=12+24-120`
`=-84`
`b)2/3sqrt9-3/2sqrt{36}+19`
`=2/3sqrt{3^2}-3/2sqrt{6^2}+19`
`=2/3*3-3/2*6+19`
`=2-9+19`
`=12`
`c)5\sqrt{0,16}+3\sqrt{0,04}`
`=5.\sqrt{(0,4)^2}+3\sqrt{(0,2)^2}`
`=5.0,4+3.0,2`
`=2+0,6`
`=2,6`