15-2x3=?
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(a,=\left(2x^3-x^2+x+4x^2-2x+2-x+1\right):\left(2x^2-x+1\right)\\ =\left[x\left(2x^2-x+1\right)+2\left(2x^2-x+1\right)-x+1\right]:\left(2x^2-x+1\right)\\ =x+2\left(\text{dư }-x+1\right)\\ b,=\left[x^2\left(2x-5\right)+3\left(2x-5\right)\right]:\left(2x-5\right)\\ =x^2+3\)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\left(2x^3+5x^2+6x-15\right):\left(2x-5\right)=\left[x^2\left(2x-5\right)+3\left(2x-5\right)\right]:\left(2x-5\right)=\left[\left(2x-5\right)\left(x^2+3\right)\right]:\left(2x-5\right)=x^2+3\)
![](https://rs.olm.vn/images/avt/0.png?1311)
-15(x+2) + 7(2x3) = -50
-15(x+2) + 7 x 6 = -50
-15(x+2) + 42 = -50
-15(x+2) = -50 - 42
-15(x+2) = -92
(x+2) = -92 : -15
(x+2) = 6,1333
x = 6,1333 + 2
x = 8,1333
-15(x+2)+7(2.3)=-50
-15(x+2)+7.6=-50
-15(x+2)+42=-50
-15(x+2)=-50-42
-15(x+2)=-92
x+2=-92:-15
x+2=92/15
x=92/15-2
x=62/15
moi nguoi nho tk va ket ban voi minh nhe
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(A=\frac{11.3^{22}.3^7-9^{15}}{\left(2.3^{14}\right).2}\)
\(A=\frac{11.3^{22+7}-\left(3^2\right)^{15}}{2^2.\left(3^{14}\right)^2}\)
\(A=\frac{11.3^{29}-3^{30}}{4.3^{28}}\)
\(A=\frac{11.3^{29}-3^{29}.3}{4.3^{28}}\)
\(A=\frac{3^{29}.\left(11-3\right)}{3^{28}.4}\)
\(A=\frac{3^{28}.3.8}{3^{28}.4}\)
\(A=\frac{3^{28}.3.4.2}{3^{28}.4}\)
\(A=6\)
\(A=3.2\)
Vậy : \(A=\frac{11.3^{22}.3^7-9^{15}}{\left(2.3^{14}\right)^2}=6\)
![](https://rs.olm.vn/images/avt/0.png?1311)
=15-6
=9