*آلمناقشة آلسابعة
حل آلمعادلات آلتالية :
X2 – 11x + 24 = 0
y2 + 2y = 63
2x2 – 9x – 35 = 0
*آلحل
X2 – 11x + 24 = 0
( x – 8 ) ( x – 3 ) = 0
X – 8 = 0
X = 8
X – 3 = 0
X = 3
( 3 , 8 )
y2 + 2y = 63
y2 + 2y – 63 = 0
( y – 7 ) ( y + 9 ) = 0
y – 7 = 0
y = 7
y + 9 = 0
y = – 9
( 7 , – 9 )
2x2 – 9x – 35 = 0
( 2x + 5 ) ( x – 7 ) = 0
2x + 5 = 0
X =
X –7 = 0
x = 7