Question

x²-10x-18=0 qual e a resposta e a conta

Answer 1

a= 1 , b= -10 e c= -18 .

∆=b²-4ac => ∆=(-10)²-4.1.(-18) => ∆=100-4.(-18)
∆=100+72 => ∆= 172.

x=-b±✓∆. x= -(-10)±13,15
------------ => -------------------- =>.
2.a. 2

x1=10+13,15. X1 = 23,15
-------------. =>. -------------- =>. x1= 11,575
2 2


X2= 10-13,15. =>. X2= -3,15. =>. X2= 1,575
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2 2