Deleted Account
#21
xlog2+log2-xlog3=0
log2=xlog3-xlog2
log2=x(log3-log2)
log2/(log3-log2)=x
X=log2/log(3/2)
X=1.70951129135
Maths solutions
#27
(2x-4)½+(x+5)½= x-9 (b)
(a)+(b) ==> 2(2x-4)½= x-8
4(2x-4)=x²-16x+64
x²--24x+80=0
(x-12)²-144+80=0
(x-12-8)(x-12+8)=0
x=20, x=4
x=4 ليس حل للمعادلة الأولية ==>
x=20