若方程4x*2+(a*2-3a-10)x+4a=0的两根互为相反数,则a的值为( ) A.5;-2 B.5 C.-2 D.
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若方程4x*2+(a*2-3a-10)x+4a=0的两根互为相反数,则a的值为( ) A.5;-2 B.5 C.-2 D.
若方程4x*2+(a*2-3a-10)x+4a=0的两根互为相反数,则a的值为( ) A.5;-2 B.5 C.-2 D.
若方程4x*2+(a*2-3a-10)x+4a=0的两根互为相反数,则a的值为( ) A.5;-2 B.5 C.-2 D.
两根互为相反数,则和为0.即X一次项系数为0
所以a²-3a-10=0
(a-5)(a+2)=0
a1=5,a2=-2
选择A
C