\(=\dfrac{x^2+2x}{2\left(x+5\right)}+\dfrac{x-5}{x}+\dfrac{25x-50}{2x\left(x+5\right)}\)
\(=\dfrac{x^3+2x^2+2\left(x^2-25\right)+25x-50}{2x\left(x+5\right)}\)
\(=\dfrac{x^3+2x^2+25x-50+2x^2-50}{2x\left(x+5\right)}\)
\(=\dfrac{x^3+4x^2+25x-100}{2x\left(x+5\right)}\)
phân tích đa thức thành nhân tử . Câu hỏi của nguoiemtinhthong.
Bài 1.1.2x2+5x−1=7x3−1−−−−−√1.1.2x2+5x−1=7x3−1
Bài 1.2.3x−1−−−−√+2x+1−−−−√=5x2−1−−−−−√41.2.3x−1+2x+1=5x2−14
Bài 1.3.3x2+4x−5−−−−−−−−−√+x−3−−−−√=11x2+25x+2−−−−−−−−−−−−√1.3.3x2+4x−5+x−3=11x2+25x+2
Bài 1.4.2x2−2x+2=3(x−2)(x2+x)−−−−−−−−−−−−√1.4.2x2−2x+2=3(x−2)(x2+x)
Bài 1.5.4x2−4x−10=8x2−6x−10−−−−−−−−−−−√1.5.4x2−4x−10=8x2−6x−10
Bài 1.6.2x2+3x+1−−−−−−−−−−√−2x2−2−−−−−−√=x+1
Rút gọn \(A=\frac{x^2+2x}{2x+10}+\frac{x-5}{x}+\frac{50-5x}{2x\left(x+5\right)}\)
Tìm x:
x^2 + 6x
x^2 - 25x + 250 = 0
x^2 + 9x = 10
2x^2 + 9x = 35
(x^2 - 2x - 1)^2 - 5 (x^2 - 2x - 1) - 14 = 0
(2k^2 + 5k + 1)^2 - 12 (2k^2 + 5k + 1) + 32 = 0
rút gọn
\(\frac{x^2+2x}{2x+10}+\frac{x-5}{x}+\frac{50-5x}{2x^2+10x}\)
Tìm x
2x3-50x=0
2x(3x-5)-(5-3x)=0
9(3x-2)=x(2-3x)
(2x-1)2-25=0
25x2-2=0
X2-25=6x-9
(2x-1)2-(2x+5)(2x-5)=18
A=\(\dfrac{x^2+2x}{2x+10}+\dfrac{x-5}{x}+\dfrac{50-5x}{2x\left(x+5\right)}\)
a) Tìm x để A xác định
b) Rút gọn A
c) Tìm x để A=1
Mấy pro toán chỉ mình nha
\(\frac{x^2+2x}{2x+10}+\frac{x-5}{x}+\frac{50-5x}{2x\left(x+5\right)}\)
Tính giá trị x để bểu thức bằng 1
Bài 3. Tìm x:
a) (3 – x)^2 – x(x – 4) = 2x – 5
b) x^2 – 2x + 1 = 25x^2
c) 4x^2 – 4x = 24
Giai pt
- \(\frac{^{\left(x+2\right)^2}}{2x-3}-1=\frac{x^2+10}{2x-3}\)
- \(\frac{x+5}{x^2-5x}-\frac{x-5}{2x^2+10x}=\frac{x+25}{2x^2-50}\)
