Toán Lớp 8: Rút gọn
Q= (2x+3)² + (2x-3)² – (4x-6) (3+2x)
Giúp vs ạ
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Toán Lớp 8: Rút gọn
Q= (2x+3)² + (2x-3)² – (4x-6) (3+2x)
Giúp vs ạ
Comments ( 2 )
Áp dụng HĐT số 1. $(A+B)^2 = A^2 +2AB+B^2$
HĐt số 2: $(A-B)^2 = A^2 -2AB+B^2$