Question

Coloque as equação do 2°grau na forma reduzida e indentifique os coeficientes a, b, c:

Answer 1

Resposta:

a)(x+1)²+(x-2)²=4

x²+1x+1x+1+x²-2x-2x+4=4

x²+x²+1x+1x-2x-2x+1+4=4

x²+1x+1x-2x-2x+1+4=4

x²+2x-2x-2x+1+4=4

x²-2x+1+4=4

x²-2x+5=4

x²-2x+5-4=0

x²-2x+1=0

a=1

b=-2

c=1

b)(1-x).(5+2x)=5

5-5x-5x-2x²=5

2x²-5x-5x+5=5

2x²-10x+5=5

2x²-10x+5-5=0

2x²-10x-0=0

a=2

b=-10

c=-0