(2-5х)"2=9 Решите плиз!). Created by Leming200. algebra-ru

(2-5х)"2=9 Решите плиз!)...

August 2022 1 16 Report

(2-5х)"2=9 Решите плиз!)

пимочка

(2-5х)²=9
4-20х+25х²-9=0
25х²-20х-5=0
5х²-4х-1=0
D=b²-4ac=16+20=36
x1=-b+√D/2a=4+6/10=10/10=1
x2=-b-√D/2a=4-6/10=-2/10=-0.2

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