Question

x²-225=0 baskara pra hj,ajudem pfv​

Answer 1

x²-225=0. => a=1, b=0, c=-225

∆=b²-4ac= 0² -4.1.(-225)=900 => √∆=30

x = -b±√∆/2a

x = -0±30/2.1

x' = 30/2 = 15 ✓

x"= -30/2 = -15 ✓

S: {-15 , 15}