Bài 1 rút gọn

a) (x+3)(x-3)-(x-3)²

b) (2x+1)²+2(2x+1)(x-1)+(x-1)²

^{c) x(x-3)(x+3)-(x^2 +1)(x^2-1)}

Bài 2 tìm x

a) (x+2)²-x^2-3x=21

b) x^2+x-12=0

c) x^3-3x^2+3x-126=0

d) x^3-5x^2+8x-4=0

e) 2x^3-x^2+3x+6=0

f) (x^2+x) (x^2+x+1)=6

Bài 1: Tìm a, b, c biết

3x^2(a^2-2bx-3c)=3x^4-12x^3+27x2

Bài 2:Tìm x biết

a) 4(x+2)-7(2x-1)+3(3x-4)=30

b) 2(5x-8)-3(4x-5)=4(3x-4)+11

c) 5x(1-2x)-3x(x+18)=0

d) (x+2)(x+3)-(x-2)(x+5)=0

Bài 1: rút gọn

a) (a+1²)-(a-1²)-3(a+1)(a-1)

b) (m³-m+1)²+(m²-3)²-2(m²-3)(m³-m+1)

Bài 1:Tìm x, biết

a) 4x(x-1)-3(x²-5)-x²=(x-3)-(x+4)

b) 2(3x-1)(2x+5-6)(2x-1)(x+2)=6

c) 3(2x-1)(3x-1)-(2x-3)(9x-1)-3=-3

Bài 1: Nhân

a) 4x(3x-1)-2(3x+1)-(x+3)

b) (-2x^2-1xy+2y^2)(-1x^2y)

c) 4x(3x^2-x) -(2x+3)^2(6x^2-3x+1)

d) (x-2)(x+2)(x+4)

Bài 2: Tìm x

a) 4x(x-1)-3(x^2-5)-x^2=(x-3)(x+4)

b) 2(3x-1)(2x+5-6)(2x-1)(x+2)=6

c) 3(2x-1)(3x-1)-(2x-3)(9x-1)-3=-3

Bài 1:
a, x^3+5x^2+3x-9
Bài 2:
a, (x^2+x^2)-2(x^2-x)-15
b, (x^2+2x) ^2+9x^2+18x+20
c, (x^2+3x+1)(x^2+3x+2)

Em cần gấp ạ!

Bài 1^: rút gọn

^{a, (2x-1)^2 +4(x-1) (x+3)-2(5-3x)^2}

b, (2a^2+2a+1)(2a^2-2a+1)-(2a^2+1)^2

c, (9x-1)^2+(1-5x)^2+2(9x-1)(1-5x)

d, (x^2+5x-1)^2+2(5x-1)(x^2-5x+1)+(5x-1)^2

e, x(x-1)(x+1)-(x+1)(x^2-x+1)

f, x(x+4)(x-4)-(x^2+1)(x^2-1)