Thực hiện phép tính
----- Nội dung dịch tự động từ ảnh -----
Bài 12: Thực hiện phép tính
1)(x+2)²+2(x+1)
2) (x-4)+(x+1)(x+2)
3) (x-y)²+2x(x+y)
4) 3(x+1)+(x+1)²
5) (x+5)2x-(x-3)²
6) x(4x+3y) 2x-(y-2x)²
7) (7x-1)(x+2)-(x+4)²
Bài 13: Tìm x biết:
1)(x+7)-x(x-3)=12
2) (2x+3)²-4x²=10
3) (x+2)-(x-2)(x+1)=3
4) 27x2(x+1)-(3x+1)=-8
5) (2x+3)-4(x-1)=10
6) (x+1)(x²-x+1)-x(x²-2)=4
8) (x-3)(x+3)-(x-1)(x²-3)
9) (2-x)(2y-5)-(2x-y)²
10) 3x(x+1)(x-1)-(2x-3)²
11) −5x(x+4) −(x−1)
12) (x-2)(x+2)(x+1)-4x (2x+1)
13) (x – 3)(x + 3)−5x(x+1)
14) (x-5)(x+5)-(x-2)+3(x-2)²
7) (x-2)-(x+1)(x+3)=-7
8) (x+1)-(x+2)(x-2)=0
9) (2x+3)-4(x-1)=16
10) (x-2)-x(x-5)-3=0
11) (3x-2)(x+9)-(3x-2)=0
12) x(4x+1)-(3x-2)=-9