-4х²-7х+2 помогите алгебрааааа х²+4х-5х²+х-428х²+10х+3...

aziza400ru @aziza400ru

April 2022 1 8 Report

-4х²-7х+2 помогите алгебрааааа
х²+4х-5
х²+х-42
8х²+10х+3

Answers & Comments

akhavalkhan Ответ:1) -4x^2-7x+2=0D=(-7)^2-4*(-4)*2=81x1=(7+sqrt(81))/2*(-4)=(7+9)/-8=-2x2=(7-sqrt(81))/2*(-4)=(7-9)/-8=1/42) х²+4х-5=0D=4^2 -4*1*(-5)=36x1= (-4+sqrt(36))/2*1=(-4+6)/2=1x2= (-4-sqrt(36))/2*1=(-4-6)/2=-53) х²+х-42=0D=1^2-4*1*(-42)=1+168=169x1=(-1+sqrt(169))/2*1=12/2=6x2=(-1-sqrt(169))/2*1=-14/2=74) 8х²+10х+3=0D= 100-96=4x1=(-10+2)/2*8=-1/2x2=(-10-2)/2*8=-3/4Объяснение:

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