Respostas

2014-02-10T18:54:50-02:00
X²+x.(2x-45)=0

x²+2x²-45x=0
3x²-45x=0

a) 3 b) -45 c) 0
Delta= -b²-4.a.c
Delta= -(-45²)-4.3.0
Delta= 2025

x=-b=- a raiz² de delta sobre 2.a
x ´= - b+ (raiz² de delta)2025/2.3
x ´= 45+45/6
x ´= 0;

x ´´ = -b- (raiz²) 2025/2.3
x ´´= 45-45/6
x ´´ = 96/ 6
x ´´ = -15




Ah amiga só consegui essa, boa sorte ! rsrs
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