问题
解答题
(1)计算:(
(2)解方程:3(x-5)2=2(5-x) |
答案
(1)原式=3+16÷(-8)+1-
×3
=3+(-2)+1-3=-1;3
(2)3(x-5)2=2(5-x),
移项得:3(x-5)2+2(x-5)=0,
分解因式得:(x-5)(3x-13)=0,
解得:x1=5,x2=
.13 3
(1)计算:(
(2)解方程:3(x-5)2=2(5-x) |
(1)原式=3+16÷(-8)+1-
×3
=3+(-2)+1-3=-1;3
(2)3(x-5)2=2(5-x),
移项得:3(x-5)2+2(x-5)=0,
分解因式得:(x-5)(3x-13)=0,
解得:x1=5,x2=
.13 3