Question

Se A=1,B=-3 e C=-4 calcule
 -b+√b²-4.a.c
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2.a

Answer 1

=[ -(-3) + {(-3).(-3) -4.1.(-4)} ] / 2.1 =[ 3 + {9 - (+16)}] / 2 =[ 3+ (- 7) ] / 2 = - 4 / 2 = -2