=>P(x)=-x2-5x-2x+3+3x3-2x2
=3x3-3x3-7x+3.
`P(x)=-x(x+5)-(2x-3)+x^2(3x-2)`
`=-x^2-5x-2x+3+3x^3-2x^2`
`=3x^3-3x^2-7x+3`
=>P(x)=-x2-5x-2x+3+3x3-2x2
=3x3-3x3-7x+3.
`P(x)=-x(x+5)-(2x-3)+x^2(3x-2)`
`=-x^2-5x-2x+3+3x^3-2x^2`
`=3x^3-3x^2-7x+3`
Thu gọn các đa thức sau:
a) P(x) = −x(x + 5) − (2x − 3) + x^2(3x − 2)
b) Q(x) = 2x(x + 1) + 3x(5 − x) − 7(x − 5).
Thu gọn biểu thức:
a) (x^2-1)(x+2)-(x-2)(x^2+2x+4)
b) (x-2)(x+3) - (x-5)(x+5) - (2x-3)
c) (3x-1)^2 + (2x+1)^2 - 2(3x-1)(2x+1)
thu gọn
\(2x(x-2)+5(x+3)+3(x+1)\)
\(5x^2-2(x+1)+3x(x-2)+5\)
Thu gọn biểu thức
(6x+1)(2x-5)
(2x+5)2-2x(2x+8)
(3x-5)(2x-1)-(2x+3)(3x+7)+30x
(X-1)2-(x+1)(x-1)
(3x+2)(9x2-6x+4)-(3+x)(x-3)
1. Thu gọn biểu thức
a) (x-3) ² + 3x (x-5)
b) (3x+2) ² - (x+3) (x-3)
2. Tìm x biết a) (x+4) ² - (x+2) (x-2)=5
b) (3x-1) ² _ (2x-3) (4x+1)= 5+x ²
thu gọn đa thức
a. 3x(x-5)-(x-2)7x
b. (x+4)(x-4)-2x(3-x)
c. (3x-7)(-2x+1)-8x(6-x)
Thu gọn biểu thức a)x^2-4x(3x-4)+7x-5 b)7x(x^2-5)-3x^2y(xy-6y^2) c)(5x+4)(2x-7) d)4x(2x-3)-5x(x-2)+x^2(3-x)
thu gọn 4x.(x-3)-3x.(2+x)b) 2x.(5x+2)+(2x-3).(3x-1)c) (x-1)^2 -(x+2).(x-2)d) (1+2x)+2.(1+2x).(x-1)+(x-1)^2
Thu gọn:
a) 2x(x2-2)-3(4-3x)-2x3+5x
b)\(\frac{x^2+1}{x^2-3x}+\frac{3}{x}-\frac{x}{x-3}\)
c)\(\frac{5}{2x-3}+\frac{2}{2x+3}-\frac{2x-33}{9-4x^2}\)