Maths solutions
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Maths solutions
403 subscribers
Maths solutions
#25
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#27
(2x-4)-(x+5) = (2x-4)½+ (x+5)½
(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
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