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Andreeamaria1231
a fost răspuns

1) (x-5)²=x(x-8)
2) 18-5x ≤ 23

Răspuns :

HawkEyed
1) (x-5)^2=x(x-8)
x^2 - 10x + 25 = x^2 - 8x
x^2 - 10x - x^2 + 8x = -25
-2x = -25
x = 12,5


2) 18-5x < = 23

-5x <= 23 - 18
-5x < = 5
x  < = 5 : - 5
x < = -1

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