Đáp án+Giải thích các bước giải:
(2x-1)(3x+2)(3-x)
=($6x^2$+4x-3x-2)(3-x)
=($6x^2$+x-2)(3-x)
=$18x^2$-$6x^3$+3x-$x^2$-6+2x
=$-6x^3$+$17x^2$+5x-6
`(2x-1).(3x+2).(3-x)`
`=[2x(3x+2)-1.(3x+2)].(3-x)`
`=(6x^2+4x-3x-2).(3-x)`
`=(6x^2+x-2).(3-x)`
`=3.(6x^2+x-2)-x.(6x^2+x-2)`
`= 18x^2+3x-6-6x^3-x^2+2x`
`=-6x^3+(18x^2-x^2)+(3x+2x)-6`
`=-6x^3+17x^2+5x-6`
65. What time _________you (start)___________your class? 66. ___________you (be) in class 12A3? 67. Mrs. Ha (learn)__________________in Hanoi, but she (not live)__________________ there. 68. My brother (not live )____________________in London; he (live )_______________ in Manchester. 69. Now Mr. Long (design ) ____________________his dream house. 70. He (like)_____________APPLES, but he (not like )_____________________bananas. 71. __________________she (like)______________apples? 72. Usually, I (have)_________________lunch at 12.00. -__________________you (have) ___________________lunch at 11.00? 73. He can (swim)_______________but I can’t(swim)_____________________. 74. At the moment, my sister (read)___________________ a comic book. 75. I (like )__________________ice-cream. 76. What ___________________Mr. Ha (live)_______________? 77. Monkeys can (climb)_________________ the tree. 78. Hang (go)__________________to the bookshop now because she ( want ) ___________to buy some books. 79. We (go) ______________to market and (buy)_________________some fruits. 80. Now, Lan (study)________________English and Lien (listen)______________to music. 81. Everynight , she (have)____________________dinner at 7.00 p.m. 82. Every year, I usually (go)______________________Vietnam. 83. In the summer, I sometimes (go)____________________swimming. 84. Every everning, my mother (like)___________ watching television. 85. Lan (have)_______________breakfast and (go)___________to school at 6.30 a.m. 86. We (not read)___________________after lunch. 87. Tom (be)___________my friend. He (play)______________sports everyday. 88. ______________your students (play)__________soccer every afternoon? 89. He (go)_____________to bed at 11.30 p.m. 90. They (go)___________home and (have)___________lunch. 91. ___________he (play)__________sports? 92. He (teach)_______________English in a big school in town. 93. Everyday she (go)____________to work by bike. 94. We usually (read)_________books, (listen)_________to music or (watch)_______TV. 95. Sometimes, I (play)__________badminton. 96. Ann (like)____________her job very much. 97. ___________your mother (walk)_________to the market? 98. Look! They (run)_________________________together. giúp mình với ạ, mình hơi kém môn anh
hãy nêu các kiến thức chủ yếu của chương 1 toán 9
X , use conjunctions at the end of each group to connect the sentences 1, My brother likes action films .He likes romantic comedies (and) 2, Vinh usually stays up late to watch soccer matches.He knows it isn't good for his health (although)
Tìm x a,2(x-5)(x+5)-(x+2)(2x-3)+x( $x^{2}$ -8)= (x+1)( $x^{2}$ -x+1) b, 3( $\frac{5}{3}$x-7)-2(1,5x+5)-(5-x)(x+4)=80+ $x^{2}$ c,4 $(x+1)^{2}$ + $(2x-1)^{2}$ -8(x-1)(x+1)=11
Giải thích từ chỗ suy ra nhá ;v
vẽ người que là 1 số anh hùng trong tất cả các phim anh hùng
gấp giúp mình nhaa!mình chuẩn bị đi học!
Giúp mik vs ạ mik cần gấp gấp gấp lắm mà có ít đ quá 😭😭
Giải chi tiết đầy đủ giúp mk nhé Thanks !
Mình cần giải gấp bài này,giúp mình với
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