Question

1.根号四十五加根号五分之十加五倍根号五分之一答案加过程2.x(2x-5)=4x-10答案加过程

Answer 1

解:√45+10/√5+5√(1/5)
=3√5+(10√5)/5+5√(5/25)
=3√5+2√5+√5
=6√5.
解：2*x(2X-5)=4x-10
4x*X-10x=4x-1o
4xx-4x-10x=-10
2xx-7x=-5
2xx-7x+5=o
x=+3或x=-3

Answer 2

解:√45+10/√5+5√(1/5)
=3√5+(10√5)/5+5√(5/25)
=3√5+2√5+√5
=6√5.

Answer 3

√(45)+10/√5+5√(1/5)
=√(9*5)+10/√5+5√(5/25)
=3√5+10/5√5+5/5√5
=3√5+2√5+√5
=6√5

x(2x-5)=4x-10
2x^2-5x= 4x-10
2x^2-9x+10=0
(x-2)(2x-5)=0
x1=2 x2=2.5