25x^2-16=0
问题描述:
25x^2-16=0
答
25x^2-16=0
(5x+4)(5x-4)=0
x1=-4/5 x2=4/5
25x^2-16=0
25x^2-16=0
(5x+4)(5x-4)=0
x1=-4/5 x2=4/5