Tìm x, biết: a) (x + 1/5)^2 - 9/25 = 0 b) (x + 1/5)^2 + 17/25 = 26/25
Giải thích
a) x+152−925=0⇒x+152=925⇒x+15=35x+15=−35⇒x=25x=−45
b) x+152+1725=2625⇒x+152=925⇒x=25x=−45
a) x+152−925=0⇒x+152=925⇒x+15=35x+15=−35⇒x=25x=−45
b) x+152+1725=2625⇒x+152=925⇒x=25x=−45