2(х-5)+4= -2х(х+3)+4РЕШИТЕ...

Question

2(х-5)+4= -2х(х+3)+4РЕШИТЕ...

Answer 1

2(х-5)+4=-2х(х+3)+4
2x-10+4=-2x^2-6x+4
2x-6+2x^2+6x-4=0
2x^2+8x-10=0
x^2+4x-5=0
D=4^2-4*1*(-5)=16+20=36
x1=(-4-6)/2=-10/2=-5
x2=(-4+6)/2=2/2=1

Answer 2

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2(х-5)+4=-2х(х+3)+4

2x-10+4=-2x^2-6x+4

2x-6+2x^2+6x-4=0

2x^2+8x-10=0

x^2+4x-5=0

D=4^2-4*1*(-5)=16+20=36

x1=(-4-6)/2=-10/2=-5

x2=(-4+6)/2=2/2=1