Toán Lớp 8: 1 ) x^2-9y^2
2) 25x^2-4y^2
3) 36X^2-25
Leave a reply
Register Now
Login
Lost Password
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Toán Lớp 8: 1 ) x^2-9y^2
2) 25x^2-4y^2
3) 36X^2-25
Comments ( 2 )
$2)25x^2-4y^2=(5x-2y)(5x+2y)$
P/S: $Áp.dụng.HĐT.số.3$:$A^2-B^2=(A-B)(A+B)$