Tìm x, biết:
SOS cứu mình
giúp mình với, mình chấm max điểm
----- Nội dung ảnh -----
Bài 14: Tìm x, biết
1) (x−5)(x+5)−(x+3)2+3(x−2)2=(x+1)2−(x+4)(x−4)+3x2
2) (2x+3)2+(x−1)(x+1)=5(x+2)2−(x−5)(x+1)+(x+4)
3) (−x+5)(−x−2)+(x−7)(x+7)=(3x+1)2−(3x−2)(3x+2)
4) (5x−1)(x+1)−2(x−3)2=(3x−1)−(x+4)2+(x2−x)
5) (4x−1)2−(3x+2)(3x−2)=(7x−1)2−(2x+1)2−4x2+7
6) (2x+3)2−(5x−4)(5x+4)=(x+5)2−(3x−1)(7x+2)−(x2−1+1)
giúp mình với, mình chấm max điểm
----- Nội dung ảnh -----
Bài 14: Tìm x, biết
1) (x−5)(x+5)−(x+3)2+3(x−2)2=(x+1)2−(x+4)(x−4)+3x2
2) (2x+3)2+(x−1)(x+1)=5(x+2)2−(x−5)(x+1)+(x+4)
3) (−x+5)(−x−2)+(x−7)(x+7)=(3x+1)2−(3x−2)(3x+2)
4) (5x−1)(x+1)−2(x−3)2=(3x−1)−(x+4)2+(x2−x)
5) (4x−1)2−(3x+2)(3x−2)=(7x−1)2−(2x+1)2−4x2+7
6) (2x+3)2−(5x−4)(5x+4)=(x+5)2−(3x−1)(7x+2)−(x2−1+1)