Întrebare
4x`2-9/2x`2-x-3=2x+3/x+1
Întrebare a fost pusă de: USER4363
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Răspuns (24)
(4x²-9)/(2x²-x-3)=(2x+3)/(x+1
)
4x²-9=(2x-3)(2x+3)
2x²-x-3=2x²+2x-3x-3=2x(x+1)-3(x+1)=(x+1)(2x-3)
(4x²-9)/(2x²-x-3)=(2x+3)/(x+1 )
(2x-3)(2x+3)/(x+1)(2x-3) =(2x+3)/(x+1 )
(2x+3)/(x+1)=(2x+3)/(x+1 )
4x²-9=(2x-3)(2x+3)
2x²-x-3=2x²+2x-3x-3=2x(x+1)-3(x+1)=(x+1)(2x-3)
(4x²-9)/(2x²-x-3)=(2x+3)/(x+1 )
(2x-3)(2x+3)/(x+1)(2x-3) =(2x+3)/(x+1 )
(2x+3)/(x+1)=(2x+3)/(x+1 )